1. Baqiyatallah University of Medical Sciences, Tehran, Iran
2. Tehran University of Medical Sciences, Iran
3. Qazvin University of Medical Sciences, Iran
4. Department of Nursing, School of Health and Welfare, Jönköping University, Jönköping, Sweden
5. King Abdulaziz University, Jeddah, Saudi Arabia
6. Duke University Medical Center, Durham, NC, USA