1. Department of Nursing, Faculty of Nursing School, Social Development & Health Promotion Research Center, Gonabad University of Medical Sciences, Gonabad, Iran
2. Iranian Research Center on Aging, University of Social Welfare and Rehabilitation, Tehran, Iran
3. Iranian Research Center on Aging, Nursing Department, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
4. Social Welfare Management Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
5. Pediatric Nursing Department, School of Nursing & Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran