I. Dabbour, A. Jazar, and F. Azzeh, “Vitamin D Status in Patients with Type 2 Diabetes Mellitus in Makkah Region of Saudi Arabia”, Pak. J. Nutr., vol. 15, no. 3, pp. 203–210, Feb. 2016, doi: 10.3923/pjn.2016.203.210.