1. ISGlobal, Barcelona, Catalonia, Spain
2. Universitat Pompeu Fabra, Barcelona, Catalonia, Spain
3. CIBER Epidemiología y Salud Pública, Madrid, Spain
4. INSERM, U1018, Centre for Research in Epidemiology and Population Health, Villejuif, France
5. Department of Epidemiology and Public Health, University College of London, London, UK
6. IMIM-Parc Salut Mar, Barcelona, Catalonia, Spain