1. Department of Epidemiology and Public Health University College London London UK
2. Research Department Universidad de la Salud del Estado de México Toluca México
3. Research Institute of Internal and Preventive Medicine – Branch of the Institute of Cytology and Genetics Siberian Branch of Russian Academy of Sciences Novosibirsk Russia
4. Novosibirsk State Medical University Novosibirsk Russia
5. Department of Epidemiology and Population Studies Jagiellonian University Collegium Medicum Krakow Poland
6. National Institute of Public Health Prague Czech Republic