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. 2021 Nov 17;12:738427. doi: 10.3389/fendo.2021.738427

Figure 1.

Figure 1

(A) Glucose responses, (B) insulin responses, and (C) C-peptide responses during IVGTT among different groups. G1, subjects with normal glucose tolerance (NGT) and time to glucose peak after 3 min; G2, subjects with NGT and time to glucose peak at 3 min; and G3, subjects with prediabetes or diabetes mellitus and time to glucose peak at 3 min.