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Jiménez-Ruiz, Carlos A; Andreas, Stefan; Lewis, Keir E; Tonnesen, Philip; van Schayck, C P; Hajek, Peter; Tonstad, Serena; Dautzenberg, Bertrand; Fletcher, Monica; Masefield, Sarah; Powell, Pippa; Hering, Thomas; Nardini, Stefano; Tonia, Thomy; Gratziou, Christina (2015). Statement on smoking cessation in COPD and other pulmonary diseases and in smokers with comorbidities who find it difficult to quit. European respiratory journal, 46(1), pp. 61-79. European Respiratory Society 10.1183/09031936.00092614
