This value set includes codes based on the following rules:

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v2-0063 version 20170801

  Code	Display
  BRO	Brother
  FTH	Father
  FND	Friend
  GRP	Grandparent
  MTH	Mother
  SIS	Sister
  SPO	Spouse

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/umls version 20200813

  Code	Display
  C1553702	Neighbor

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-NullFlavor version 20090501

  Code	Display
  OTH	Other
  UNK	Unknown