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