1. Nursing Research Center, Faculty of Nursing and Midwifery , Golestan University of Medical Sciences , Gorgan , Islamic Republic of Iran
2. Behavioral Sciences Research Center , Life Style Institute, Baqiyatallah University of Medical Sciences , Tehran , Islamic Republic of Iran
3. and Nursing Faculty , Baqiyatallah University of Medical Sciences , Tehran , Islamic Republic of Iran
4. Biostatistics and Epidemiology Department, Faculty of Health, Health Management and Social Development Research Center , Golestan University of Medical Sciences , Golestan , Islamic Republic of Iran