1 Agency for Healthcare Quality and Evaluation of Catalonia (AQuAS), Roc Boronat, 81-95, 2a planta, 08005 Barcelona, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Barcelona, Spain; Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain. Electronic address: marcella.marinelli@gmail.com.