Meperidine+Normeperidine:PrThr:Pt:Urine:Ord:Screen
meperidine+normeperidine:prthr:pt:urine:ord:screen
Meperidine+Normeperidine:PrThr:Pt:Urine:Ord:Screen
meperidine+normeperidine:prthr:pt:urine:ord:screen