Muhammad Waqas Ashfaq , Rai Muhammad Asghar , Saba Naim Khan. “Vitamin D Deficiency Among Healthy Infants”. Journal of Rawalpindi Medical College 18, no. 1 (June 30, 2014). Accessed January 21, 2026. https://mail.journalrmc.com/index.php/JRMC/article/view/380.