[Electron microscopic observations of pancreatic beta cells of diabetic patients].
D003594:Cytoplasmic Granules; D003920:Diabetes Mellitus / Q000473:pathology*; D006801:Humans; D007515:Islets of Langerhans / Q000473:pathology*; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged