1. Department of Internal Medicine and Oncology, Semmelweis University Faculty of Medicine, Budapest, Hungary
2. National Centre for Diabetes Care, Budapest, Hungary
3. School of Ph.D. Studies, Semmelweis University, Budapest, Hungary
4. Department of Public Health, Semmelweis University Faculty of Medicine, Budapest, Hungary
5. Department of Epidemiology & Public Health, University College London, London, UK