Fig. 2

Hematoxylin-eosin-stained samples from fundus (A, B), corpus (C, D) and antrum (E, F). The human mucosal biopsies were obtained from the excised part of the stomach during sleeve gastrectomy (A, C, E) and in corresponding gastric bypassed mucosa ≥ 8 months post RYGB by balloon-enteroscopy (B, D, F).