1. From the Department of Nephrology, Department of Medicine, College of Medicine, King Khalid University Hospital, Riyadh
2. Address reprint requests and correspondence to Dr. Huraib: Department of Medicine (38), King Khalid University Hospital, P.O. Box 2925, Riyadh 11461, Saudi Arabia
3. From the Department of Endocrinology, Department of Medicine, College of Medicine, King Khalid University Hospital, Riyadh