title: Five authors reply.
authors: Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD Social and Cardiovascular Epidemiology Research Group, School of Medicine, University of Alcalá, Madrid, Spain.
authors: Usama
authors: U
authors: Bilal
authors: Tobacco Control Unit, Cancer Prevention Program, Institut Català d'Oncologia, l'Hospitalet de Llobregat, Spain Cancer Control and Prevention Area, Institut d'Investigació Biomèdica de Bellvitge, L'Hospitalet de Llobregat, Spain Department of Clinical Sciences, Medical School (Bellvitge), Universitat de Barcelona, L'Hospitalet de Llobregat, Spain.
authors: Esteve
authors: E
authors: Fernández
authors: Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD Department of Environmental Health Sciences and Institute for Global Tobacco Control, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.
authors: Ana
authors: A
authors: Navas-Acien
authors: Social and Cardiovascular Epidemiology Research Group, School of Medicine, University of Alcalá, Madrid, Spain CIBER Epidemiología y Salud Pública, Spain.
authors: Francisco
authors: F
authors: Bolumar
authors: Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD Social and Cardiovascular Epidemiology Research Group, School of Medicine, University of Alcalá, Madrid, Spain Department of Epidemiology, Atherothrombosis, and Cardiovascular Imaging, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain.
authors: Manuel
authors: M
authors: Franco
mesh_terms: D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality*; D008297:Male; D015233:Models, Statistical; D012907:Smoking / Q000453:epidemiology*; D016540:Smoking Cessation / Q000706:statistics & numerical data*