1 Tobacco Control Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy Italian College GPs (SIMG), Milan, Italy Both authors contributed equally.
2 Tobacco Control Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy Both authors contributed equally.
3 Tobacco Control Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy Cardiopulmonary Rehabilitation Unit, Azienda Sociosanitaria Territoriale Lariana, Cantù, Italy [email protected].
4 Tobacco Control Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.
5 Pulmonary Rehabilitation and Weaning Center, Auxilium Vitae, Volterra, Italy.
6 Airway Disease Section, National Heart and Lung Institute, Imperial College, London, UK.
7 Tobacco Control Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy Italian College GPs (SIMG), Milan, Italy.