1. Department of Public Health and Maternal and Child Health, Faculty of Medicine Complutense University of Madrid Madrid Spain
2. Spanish Centre for Pharmacoepidemiologic Research (CEIFE) Madrid Spain
3. Global Epidemiology, Boehringer Ingelheim Pharmaceuticals, Inc Ridgefield Connecticut
4. Corporate Department of Global Epidemiology Boehringer Ingelheim GmbH Ingelheim Germany
5. Hannover Medical School, Institute for Epidemiology, Social Medicine and Health Systems Research Hannover Germany
6. Department of Epidemiology Harvard T.H. Chan School of Public Health Boston Massachusetts