SOFIA SHOUKAT; MAHEEN SAAD; MUHAMMAD RAZAQ; NADIA QAZI; JAHANGIR ZAIB; TAHIRA JEHANGIR. Role of pneumococcal and influenza vaccine in prevention and vitamin E with beta carotene in treatment of pneumonia in patients with COPD. Pakistan Journal of Chest Medicine, [S. l.], v. 28, n. 1, p. 13–19, 2022. Disponível em: https://www.pjcm.net/index.php/pjcm/article/view/849. Acesso em: 15 dec. 2025.