1. Public Health and Preventive Medicine Training Unit, Parc de Salut Mar – Pompeu Fabra University – Public Health Agency of Barcelona, Barcelona, Spain
2. CIBER Epidemiología y Salud Pública, Madrid, Spain
3. Center for Research in Occupational Health, Universitat Pompeu Fabra, Barcelona, Spain
4. IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
5. FLACSO-España, Santander, Spain