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Figure 3 Electron micrographs showing nuclear membrane damage (arrow) (a), bleb formation (arrow) (b) and c) and nuclear pore clustering (arrow) (d) in cardiac myocytes from myocardial samples of patients A-II-1 (a), B-III-1 (b), C-II-2 (c) and D-II-1 (d) (uranyl-acetate, lead citrate). Bar scales = 0.6 mµ.