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Fujiwara D, Takahashi K, Suzuki T, et al. Postprandial serum C-peptide value is the optimal index to identify patients with non-obese type 2 diabetes who require multiple daily insulin injection: analysis of C-peptide values before and after short-term intensive insulin therapy. J Diabetes Investig 4: 618-625, 2013.","DOI":"10.1111\/jdi.12103"},{"key":"9","doi-asserted-by":"crossref","unstructured":"9. Iwamoto Y, Kimura T, Shimoda M, et al. C-peptide index at 2 h post-meal is a useful predictor of endogenous insulin secretory capacity and withdrawal from insulin therapy in subjects with type 2 diabetes. Diabetes Obes Metab 26: 2761-2773, 2024.","DOI":"10.1111\/dom.15595"},{"key":"10","doi-asserted-by":"crossref","unstructured":"10. Funakoshi S, Fujimoto S, Hamasaki A, et al. Analysis of factors influencing postprandial C-peptide levels in Japanese patients with type 2 diabetes: comparison with C-peptide levels after glucagon load. 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