1. Department of Social Medicine, Faculty of Medicine, University of Crete, Heraklion, Greece
2. Department of Environmental Health, National Institute for Health and Welfare, Kuopio, Finland
3. Laboratory of Clinical Chemistry-Biochemistry, Department of Laboratory Medicine, School of Medicine, University of Crete, Heraklion, Crete, Greece
4. Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, Athens, Greece
5. Obesity Prevention Program, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts, USA
6. Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
7. Hospital del Mar Research Institute (IMIM), Barcelona, Spain
8. CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
9. National School of Public Health, Athens, Greece