Dextromethorphan+Levorphanol:PrThr:Pt:Urine:Ord
dextromethorphan+levorphanol:prthr:pt:urine:ord
Dextromethorphan+Levorphanol:Presence or Threshold:To identify measures at a point in time:Urine:Ordinal
dextromethorphan+levorphanol:presence or threshold:to identify measures at a point in time:urine:ordinal