S-beta aminoisobutyrate/Creatinine:SRto:Pt:Urine:Qn
s-beta aminoisobutyrate/creatinine:srto:pt:urine:qn
S-beta aminoisobutyrate/Creatinine [Molar ratio] in Urine
s-beta aminoisobutyrate/creatinine [molar ratio] in urine