1. Department of Medical-Surgical Nursing, Faculty of Nursing and Midwifery, Tabriz University of Medical Sciences, Tabriz, Iran
2. School of Nursing, University of North Carolina at Charlotte, Charlotte, NC, USA
3. Department of Psychology Nursing, School of Nursing and Midwifery, Tabriz University of Medical Sciences, Tabriz, Iran
4. Department of Statistics and Epidemiology, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran