7-Hydroxymitragynine/Creatinine:MRto:Pt:Urine:Qn
7-hydroxymitragynine/creatinine:mrto:pt:urine:qn
7-Hydroxymitragynine/Creatinine:Mass Ratio:To identify measures at a point in time:Urine:Quantitative
7-hydroxymitragynine/creatinine:mass ratio:to identify measures at a point in time:urine:quantitative