1. Group of Evaluation of Health Determinants and Health Policies, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Spain
2. Health Sciences Research Institute, University of California Merced (UC Merced), Merced, CA, USA
3. Tobacco Control Unit, Cancer Prevention and Control Program, Institut Català d’Oncologia, L'Hospitalet de Llobregat, Spain
4. Cancer Prevention and Control Group, Institut d’Investigació Biomèdica de Bellvitge - IDIBELL, L'Hospitalet de Llobregat, Spain