Naeem, Zahid, AbdulRahman AlMohaimeed, Fawzy Khalil Sharaf, Hisham Ismail, Faiza Shaukat, and SN Bazmi Inam. “Vitamin D Status Among Population of Qassim Region, Saudi Arabia”. International Journal of Health Sciences 5, no. 2 (July 1, 2011). Accessed May 20, 2024. https://pub.qu.edu.sa/index.php/journal/article/view/402.