1. Division of Environmental Epidemiology; Institute for Risk Assessment Sciences; Utrecht University; Utrecht The Netherlands
2. Centre for Research in Environmental Epidemiology (CREAL); Barcelona Spain
3. Hospital del Mar Research Institute (IMIM); Barcelona Spain
4. CIBER Epidemiología y Salud Pública (CIBERESP); Barcelona Spain
5. Department Environmental Health; National Institute for Health and Welfare; Kuopio Finland
6. Public Health and Clinical Nutrition; University of Eastern Finland; Kuopio Finland