Fig. 4

Representative immunofluorescence staining of enteroendocrine cells using the chromogranin A antibody marker in samples from the fundus (A, B), corpus (C, D) and antrum (E, F). Samples were obtained from the stomach during sleeve gastrectomy (A, C, E) and from the corresponding gastric bypassed mucosa at ≥ 8 months post RYGB (B, D, F).