1. Department of Family and Community Medicine, College of Medicine, Qassim University , Buraidah , Saudi Arabia
2. Department of Medical Microbiology, College of Medicine, Qassim University , Buraidah , Qassim , Saudi Arabia
3. Department of Nutrition and Food Sciences, Menoufia University , Shebin El-Kom , Egypt
4. Home Economics Dept, Faculty of Specific Education, Zagazig University , Zagazig , Egypt
5. Department of Family Medicine, College of Medicine, Qassim University , Unaizah , Saudi Arabia
6. Department of Medical Biochemistry, College of Medicine, Qassim University , P.O. Box 6655 , Buraidah-51452 , Saudi Arabia