1. Department of Community Health Nursing, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2. Affiliated Researcher, Department of Health Care Sciences, Palliative Care Center, Marie Cederschiöld Högskola, Campus Ersta, Stockholm, Sweden
3. Department of Basic Sciences, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran