DR ADNAN KHAN; DR HANIF MUHAMMAD; DR SALMAN HAKIM; DR MUHAMMAD IDREES KHAN. FREQUENCY OF VITAMIN D DEFICIENCY AMONG CHILDREN PRESENTING WITH ACUTE RESPIRATORY TRACT INFECTIONS: A CROSS-SECTIONAL STUDY. Journal of Population Therapeutics and Clinical Pharmacology, [S. l.], v. 31, n. 8, p. 2754–2762, 2024. DOI: 10.53555/ct1dh092. Disponível em: https://www.jptcp.com/index.php/jptcp/article/view/8006. Acesso em: 11 sep. 2025.