S B Ravara1, N Miranda2, J M Calheiros3, F Berteletti4, L Joossens5. 1. Health Sciences Research Center, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal; CHCB University Hospital, Covilhã, Portugal. Electronic address: sbravara@fcsaude.ubi.pt. 2. National Institute of Health Dr. Ricardo Jorge, Lisbon, Portugal. 3. Health Sciences Research Center, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal; CHCB University Hospital, Covilhã, Portugal. 4. Smoke Free Partnership, Brussels, Belgium. 5. Association of European Cancer Leagues, Belgian Foundation Against Cancer, Brussels, Belgium.