1. Department of Epidemiology and Population Studies, Jagiellonian University Medical College, Krakow, Poland
2. Department of Epidemiology and Public Health, University College London, London, UK
3. National Institute of Public Health, Prague, Czech Republic
4. Institute of Internal and Preventive Medicine, Novosibirsk, Russia
5. Novosibirsk State Medical University, Novosibirsk, Russia
6. MRC Unit for Lifelong Health and Ageing, University College London, London, UK