DÜNDAR, Ahmet; ÇETIK YILDIZ, Songül; IRMAK, Halit. Pediatric Vitamin D Status: Age, Gender, and Seasonal Determinants in a Comprehensive Retrospective Cohort. The European Research Journal, [S. l.], p. 650–658, 2026. DOI: 10.18621/eurj.1783317. Disponível em: https://www.eurj.org.tr/article/view/1134. Acesso em: 23 may. 2026.