1 Martin Luther University Halle-Wittenberg, Medical Faculty, Interdisciplinary Centre for Health Sciences (PZG), Institute of Medical Sociology Halle (Saale), Germany.
2 WHO Office on Quality of Care and Patient Safety, World Health Organization Regional Office for Europe (WHO/Europe) Athens, Greece.
3 Technical University of Munich, School of Medicine and Health, Department of Health and Sport Sciences, Chair of Social Determinants of Health Munich, Germany.