1. Department of Health Education and Promotion, School of Health, Sabzevar University of Medical Sciences, Sabzevar, Iran
2. Department of Public Health, Khomein University of Medical Sciences, Khomein, Iran
3. Department of Biostatistics and Epidemiology, School of Health, Sabzevar University of Medical Sciences, Sabzevar, Iran
4. Iranian Research Center on Healthy Aging, Department of Medical-Surgical Nursing, School of Nursing and Midwifery, Sabzevar University of Medical Sciences, Sabzevar, Iran