handedness (HandednessSide)

b2boptic → items → item → pair → patient

values	description
RIGHT	the right hand is dominant
LEFT	the left hand is dominant
BALANCED	no hand is dominant

<xs:simpleType name="HandednessSide">
  <xs:restriction base="xs:string">
    <xs:enumeration value="RIGHT"/>
    <xs:enumeration value="LEFT"/>
    <xs:enumeration value="BALANCED"/>
  </xs:restriction>
</xs:simpleType>