Received: 28 May 2022
Accepted: 2 November 2022
First Online: 8 November 2022
: This cross-sectional survey was approved by the Institutional Review Board of Dow University of Health Sciences (Ref. IRB-784/DUHS/Approval/2016/341).Research methods were carried out following relevant guidelines and regulations following the Declaration of Helsinki, as written informed consent was obtained from all individuals to use their anonymous information and laboratory results of serum vitamin D levels for the conducted research when collecting samples at DDRL. Parents or legal guardians signed informed consent for the participating children and adolescents.
: Not applicable.
: The authors declare that they have no competing interests (financial and non-financial) related to the article.