NAJAH RAJAB GHOUMAH; MUSTAFA SAIEH. Association Between Serum Vitamin D Levels and Acute Respiratory Tract Infections Among Preschool Children in Gharyan Hospital, Libya. African Journal of Advanced Pure and Applied Sciences , [S. l.], v. 5, n. 2, p. 313–322, 2026. Disponível em: https://www.aaasjournals.com/index.php/ajapas/article/view/2031. Acesso em: 22 jun. 2026.