Arsenic.inorganic/Creatinine:MRto:24H:Urine:Qn
arsenic.inorganic/creatinine:mrto:24h:urine:qn
Arsenic.inorganic/Creatinine:Mass Ratio:24 hours:Urine:Quantitative
arsenic.inorganic/creatinine:mass ratio:24 hours:urine:quantitative