18-Hydroxycortisol/Creatinine:MRto:24H:Urine:Qn
18-hydroxycortisol/creatinine:mrto:24h:urine:qn
18-Hydroxycortisol/Creatinine:Mass Ratio:24 hours:Urine:Quantitative
18-hydroxycortisol/creatinine:mass ratio:24 hours:urine:quantitative