RAHMAN, Md Habibur et al. Role of Vitamin D Supplementation on Patients of Severe COPD to Reduce Exacerbations. Chest & Heart Journal , [S. l.], v. 45, n. 1, p. 26–30, 2023. Disponível em: https://banglajol.info/index.php/CHJ/article/view/64739. Acesso em: 16 apr. 2025.