R-beta aminoisobutyrate/Creatinine:SRto:Pt:Urine:Qn
r-beta aminoisobutyrate/creatinine:srto:pt:urine:qn
R-beta aminoisobutyrate/Creatinine:SRto:Pt:Urine:Qn
r-beta aminoisobutyrate/creatinine:srto:pt:urine:qn