HYDROcodone:PrThr:Pt:Gast fld:Ord
hydrocodone:prthr:pt:gast fld:ord
HYDROcodone:Presence or Threshold:To identify measures at a point in time:Gastric fluid/contents:Ordinal
hydrocodone:presence or threshold:to identify measures at a point in time:gastric fluid/contents:ordinal