PENTobarbital:PrThr:Pt:Ser/Plas:Ord
pentobarbital:prthr:pt:ser/plas:ord
PENTobarbital:Presence or Threshold:To identify measures at a point in time:Serum/Plasma:Ordinal
pentobarbital:presence or threshold:to identify measures at a point in time:serum/plasma:ordinal