Determination of proline in human serum by a robust LC-MS/MS method: application to identification of human metabolites as candidate biomarkers for esophageal cancer early detection and risk stratification.
Liang S, Sanchez-Espiridion B, Xie H, Ma J, Wu X, Liang D. Determination of proline in human serum by a robust LC-MS/MS method: application to identification of human metabolites as candidate biomarkers for esophageal cancer early detection and risk stratification. Biomed Chromatogr. 2015 Apr; 29(4):570-7.