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