1. Addiction and Behavioral Sciences Research Center, North Khorasan University of Medical Sciences, Bojnurd, Iran
2. Iranian Research Center on Healthy Aging, Sabzevar University of Medical Sciences, Sabzevar, Iran
3. Doctoral School of Health Sciences, University of Pécs, Hungary
4. Nursing and Midwifery College, Sabzevar University of Medical Sciences, Sabzevar, Iran
5. Department of Epidemiology and Biostatistics, Sabzevar University of Medical Sciences, Sabzevar, Iran
6. McGill University, Montreal, QC, Canada