1. Departement of Public Health, Faculty of Medicine, Mutah University, Jordan.Departement of Public Health, Faculty of Medicine, Mutah University, Jordan.
2. Departement of Physiology and Pathology, Faculty of Medicine, Mutah University, Jordan.
3. Departement of nursery, Faculty of Karak College, Al-Balqa' Applied University, Jordan.
4. Departement of pediatrics, Faculty of Medicine, Mutah University, Jordan