1. Department of Nursing, Faculty of Nursing and Midwifery; Shahed University; Tehran Iran
2. Elderly Care Research Center, Department of Nursing, Faculty of Nursing and Midwifery; Shahed University; Tehran Iran
3. Faculty of Nursing and Health Sciences; Nord University; Bodø Norway
4. Faculty of Nursing; Baqiyatallah University of Medical Sciences; Tehran Iran
5. College of Nursing; Montana State University; Bozeman Montana USA