Gamma hydroxybutyrate:PrThr:Pt:XXX:Ord:Confirm
gamma hydroxybutyrate:prthr:pt:xxx:ord:confirm
Gamma hydroxybutyrate:Presence or Threshold:To identify measures at a point in time:Not specified:Ordinal:Confirm
gamma hydroxybutyrate:presence or threshold:to identify measures at a point in time:not specified:ordinal:confirm