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. 1–9, 2026. DOI: 10.18621/eurj.1783317. Disponível em: https://eurj.org.tr/article/view/1134. Acesso em: 5 apr. 2026.