FREQUENCY OF POLYCYTHEMIA IN PATIENTS PRESENTING WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE. The Research of Medical Science Review, [S. l.], v. 3, n. 7, p. 1544–1554, 2025. Disponível em: https://medscireview.net/index.php/Journal/article/view/1684.. Acesso em: 6 aug. 2025.