1. From the Department of Child Health, College of Medicine, King Saud University, Abha Branch, Abha
2. Address reprint requests and correspondence to Dr. El Awad: Department of Child Health, College of Medicine, King Saud University, Abha Branch, P.O. Box 641, Abha, Saudi Arabia
3. Senior Consultant Pediatrician, Prince Abdullah Ibn Abdulaziz Hospital, Bisha