Status of Vitamin D among Patients Admitted with Acute Exacerbation of COPD in Cox’s Bazar Medical College Hospital. Journal of Medicine, [S. l.], v. 23, n. 2, p. 121–125, 2022. DOI: 10.3329/jom.v23i2.60628. Disponível em: https://banglajol.info/index.php/JOM/article/view/60628. Acesso em: 10 jul. 2026.