The relationship between serum vitamin D level & chronic periodontitis in patients attending Khanzad center in Erbil city. AMJ (Advanced Medical Journal) , [S. l.], v. 5, n. 2, p. 99–104, 2023. DOI: 10.56056/amj.2019.109. Disponível em: https://amj.khcms.edu.krd/index.php/main/article/view/257. Acesso em: 29 jan. 2026.