1. Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
2. Department of Health Education and Health Promotion, Faculty of Health, Mashhad University of Medical Sciences, Mashhad, Iran
3. Department of Mathematics and Statistics, Macquarie University, Sydney, Australia
4. Department of Mathematics, LMNO, Caen University, Caen, France
5. Head of Department of Medical Education Brighton and Sussex Medical School, Medical Education and Metabolic Medicine, Brighton, UK