1. PhD candidate in Nursing, School of Nursing and Midwifery, Tehran University of Medical Sciences, Tehran, Iran;
2. Nursing and Midwifery Care Research Center, School of Nursing and Midwifery, Tehran University of Medical Sciences, Tehran, Iran;
3. Associate Professor in Public Health Nursing Dept. & Geriatrics Nursing Dept. School of Nursing and Midwifery, Iran University of Medical Sciences, Tehran, Iran;
4. Assistant Professor, UCSF Division of Hospital Medicine, University of California, San Francisco, USA