Faculty of Medicine, Cairo University, Cairo, Egypt. Ain Shams University Faculty of Medicine, Cairo, Egypt. Pediatric Department, Faculty of Medicine, Assiut University, Assiut, Egypt. khaled.ali@med.au.edu.eg. Department of Internal Medicine, Faculty of Medicine, Assiut University, Assiut, Egypt. Pediatric Department, Faculty of Medicine, Assiut University, Assiut, Egypt. Research and Scientific Studies Unit, College of Nursing, Jazan University, Jazan, Saudi Arabia. Department of Community Health Nursing, Faculty of Nursing, Assiut University, Assiut, Egypt. Department of Community Health Nursing, Alddrab University College, Jazan University, Jazan, Saudi Arabia.