Sert S, Taner A. Variations of 25-Hydroxyvitamin D Levels During COVID-19 Pandemic and its Relation to Season, Sex and Age in Children: 25-Hydroxyvitamin D Levels During COVID-19 Pandemic. JPA [Internet]. 2024 Dec. 31 [cited 2025 Jan. 29];5(4):123-9. Available from: https://jpediatricacademy.com/index.php/jpa/article/view/362