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Normal tissues showed weak to moderate cytoplasmic positivity and occasional membranous staining. Gall bladder displayed strong cytoplasmic and membranous positivity. Liver and exocrine pancreas exhibited strong cytoplasmic staining. Pneumocytes, islet cells of Langerhans, thyroid, parathyroid, adrenal, cells in glomeruli, myocytes and the lymphoid tissues were negative.