1. Department of Health Management and Economics, School of Public Health, International campus, Tehran University of Medical Sciences, Tehran, 14155 Box 6446, Iran
2. School of Public Health, Tehran University of Medical Sciences, Tehran, 14155 Box 6446, Iran
3. Dean Faculty of Nursing, Islamic University of Gaza, PO Box 108, Gaza Strip, Palestine
4. Al Mustaqbal Research Center, Gaza Strip, Palestine