Figure 1: The changes in BMI (a), platelet counts (b), and concentrations of gamma-glutamyltransferase (GGT) (c) are shown at baseline, that is, before surgery, at the 1st followup (1 year), and at the 2nd followup (3 years). Group symbols are as follows: morbidly obese patients treated with Roux-en-y gastric bypass surgery, white bars; morbidly obese patients treated with biliopancreatic diversion with duodenal switch, black bars. Mean values are shown. Statistical significance is indicated by values. F-up denotes followup.