1. Department of Psychiatric Nursing, Faculty of Nursing & Midwifery, Tabriz University of Medical Sciences, Tabriz, Iran;
2. Department of Statistics and Epidemiology, Faculty of Health sciences, Tabriz University of Medical Sciences, Tabriz, Iran;
3. School of Health Sciences, University of Tasmania, Launceston, Tasmania, Australia;
4. School of Health Sciences, University of Tasmania, Sydney, New South Wales, Australia