721198006: Premature ovarian failure due to autoimmune oophoritis (disorder)

SNOMED CT Concept\Clinical finding (finding)\...

\Viscus structure finding (finding)\Abdominal organ finding\Pelvic organ finding (finding)\Ovary finding\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)

\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Disorder of abdominopelvic segment of trunk\Disorder of pelvic region of trunk (disorder)\Disorder of pelvis\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Disorder of abdominopelvic segment of trunk\Disorder of pelvic region of trunk (disorder)\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Disorder of abdominopelvic segment of trunk\Disorder of pelvic region of trunk (disorder)\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Disorder of abdominopelvic segment of trunk\Disorder of abdomen (disorder)\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Primary hypogonadism (disorder)\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of pelvic region of trunk (finding)\Finding of pelvis (finding)\Pelvic organ finding (finding)\Ovary finding\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of pelvic region of trunk (finding)\Finding of pelvis (finding)\Disorder of pelvis\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of pelvic region of trunk (finding)\Disorder of pelvic region of trunk (disorder)\Disorder of pelvis\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of pelvic region of trunk (finding)\Disorder of pelvic region of trunk (disorder)\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of pelvic region of trunk (finding)\Disorder of pelvic region of trunk (disorder)\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of pelvic region of trunk (finding)\Female genitalia finding\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of pelvic region of trunk (finding)\Female genitalia finding\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of pelvic region of trunk (finding)\Female genitalia finding\Ovary finding\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of abdomen\Abdominal organ finding\Pelvic organ finding (finding)\Ovary finding\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Finding of abdomen\Disorder of abdomen (disorder)\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Genital finding\Female genitalia finding\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Genital finding\Female genitalia finding\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Genital finding\Female genitalia finding\Ovary finding\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Genital finding\Disorder of endocrine gonad\Hypogonadism\Primary hypogonadism (disorder)\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Genital finding\Disorder of endocrine gonad\Hypogonadism\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Genital finding\Disorder of endocrine gonad\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Primary hypogonadism (disorder)\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Finding of abdominopelvic segment of trunk (finding)\Urogenital finding (finding)\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of pelvic region of trunk (disorder)\Disorder of pelvis\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of pelvic region of trunk (disorder)\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of pelvic region of trunk (disorder)\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of abdomen (disorder)\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Primary hypogonadism (disorder)\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)

\Functional finding\Decline in functional status (finding)\Decreased hormone secretion\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)

\Endocrine finding\Decreased hormone secretion\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)

\Disease\Disorder of body system\Disorder of endocrine system\Disorder of endocrine gonad\Hypogonadism\Primary hypogonadism (disorder)\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of body system\Disorder of endocrine system\Disorder of endocrine gonad\Hypogonadism\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of body system\Disorder of endocrine system\Disorder of endocrine gonad\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of body system\Disorder of endocrine system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of body system\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of body system\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of body system\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Primary hypogonadism (disorder)\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of body system\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of body system\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of pelvic region of trunk (disorder)\Disorder of pelvis\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of pelvic region of trunk (disorder)\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of pelvic region of trunk (disorder)\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of abdomen (disorder)\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital system\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of female reproductive system (disorder)\Disorder of female genital organs\Disorder of ovary\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Primary hypogonadism (disorder)\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Hypogonadism\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)
\Disease\Disorder of trunk (disorder)\Disorder of abdominopelvic segment of trunk\Disorder of the genitourinary system (disorder)\Disorder of reproductive system\Disorder of endocrine gonad\Disorder of endocrine ovary\Female hypogonadism syndrome\Ovarian failure\Primary ovarian failure\Premature ovarian failure\Premature ovarian failure due to autoimmune oophoritis (disorder)

Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2017. Module: SNOMED CT core

Descriptions:

Id Description Lang Type Status Case? Module

3324589017 Premature ovarian failure due to autoimmune oophoritis (disorder) en Fully specified name Active Entire term case insensitive (core metadata concept) SNOMED CT core

3324590014 Premature ovarian failure due to autoimmune oophoritis en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
Premature ovarian failure due to autoimmune oophoritis (disorder)	Due to	Oophoritis	true	Inferred relationship	Some	2
Premature ovarian failure due to autoimmune oophoritis (disorder)	Is a	Premature ovarian failure	true	Inferred relationship	Some
Premature ovarian failure due to autoimmune oophoritis (disorder)	Finding site	Ovarian endocrine structure	true	Inferred relationship	Some	3
Premature ovarian failure due to autoimmune oophoritis (disorder)	Has interpretation	Decreased	true	Inferred relationship	Some	1
Premature ovarian failure due to autoimmune oophoritis (disorder)	Interprets	Hormone secretion	true	Inferred relationship	Some	1

Inbound Relationships

Type

Active

Source

Characteristic

Refinability

Group

This concept is not in any reference sets