1. Department of Midwifery, School of Nursing and Midwifery, Neyshabur University of Medical Sciences, Neyshabur, Iran
2. Social Determinants of Health Research Centre, Mashhad University of Medical Sciences, Mashhad, Iran
3. Iranian Research Centre on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
4. Department of Midwifery, School of Nursing and Midwifery, Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran