Deng Y, Zhang C, Wang J, Zeng J, Zhang J, Zhang T, Zhao H, Zhou W, Zhang C. An Accurate Isotope Dilution Liquid Chromatography-Tandem Mass Spectrometry Method for Serum C-Peptide and Its Use in Harmonization in China. Ann Lab Med 2023;43:345-354. https://doi.org/10.3343/alm.2023.43.4.345