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Plasma concentrations of glucose (A), insulin (B), C-peptide (C), and FFAs (D) during OGTT in obese patients before (pre-OP; n = 6; ■) and after RYGB surgery (post-OP; n = 6; □), as well as matching obese (CONob; n = 6; ●) and lean controls (CONlean; n = 6; ○), which were previously presented (3). Kruskal-Wallis test: *P < 0.05, pre-OP vs. post-OP; §P < 0.05, pre-OP vs. CONob; &P < 0.05, pre-OP vs. CONlean; #P < 0.05, post-OP vs. CONob; €, post-OP vs. CONlean.
