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