28.06.2001
Smoking cessation in patients with chronic obstructive pulmonary disease: a double-blind, placebo-controlled, randomised trial
D.P. Tashkin, R. Kanner, W. Bailey, S. Buist, P. Anderson, M.A. Nides, D. Gonzales, G. Dozier, M.K. Patel, B.D. Jamerson
The Lancet, 2001; 357: 1571-1575