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Histopathological examinations. (A) Histopathology of the pulmonary artery at high magnification. Thickening of the intimal layer of the muscular pulmonary arteries was identified on Elastica van Gieson staining. (B) Histopathology of the left ventricle of the heart at low magnification. Mild basophilic changes in cardiomyocytes and congestive changes between cardiomyocytes were identified on Hematoxylin and Eosin staining.
