[1] Alexandria University,Gerontological Nursing, Faculty of Nursing
[2] Alexandria University,Family Health Department, High Institute of Public Health
[3] Alexandria University,Internal Medicine, Geriatric Unit, Faculty of Medicine
[4] National Cancer Institute,Cancer Epidemiology and Biostatistics
[5] Cairo University,Medical
[6] Alexandria University,Surgical Nursing, Faculty of Nursing
[7] Helwan University,Geriatric Medicine and Gerontology, Faculty of Medicine