status, and quality of life. Arch Intern Med. 2007; 167:60-67. 9. Wagena EJ, Kant IJ, Huibers MJH, van Amelsvoort LG, Swaen GM, Wouters EF, van Schayck CP. Psychological distress and depressed mood in employees with asthma, chronic bronchitis or emphysema: a population-based observational study on prevalence and the relationship with smoking cigarettes. Eur J Epidemiol. 2004; 19:147-153. 10. Anthonisen NR, Connett JE, Kiley JP, Altose MD, Bailey W, Buist S et al. Effects of smoking intervention and the use of an inhaled anticholinergic bronchodilator on the rate of decline of FEV1: The Lung Health Study. JAMA 1994; 272:1497-1505. 11. Murray PR., Bailey W., Daniels K., Bjoruson WM., Kurnov R., Connett J et al. Safety of nicotine policrilex gum used by 3094 participants in the lung health study. Chest 1996; 109:438-445. 12. Tønnesen P, Mikkelsen KL. Routine smoking cessation with 4 nicotine regiments in a lung clinic. Eur Respir J. 2000; 16:714-22. 13. Tønnesen P, Mikkelsen K, Bremann L. Nurse-conducted smoking cessation in patients with COPD, using nicotine sublingual tablets and behavioral support. Chest 2006; 130:334342. 14. Strassmann R, Bausch B, Spaar A, Kleijnen J, Braendli O, Puhan MA. Smoking cessation interventions in COPD: a network meta-analysis of randomised trials. Eur Respir J. 2009; 34:634-40. 15. Tashkin DP, Kanner R, Bailey W, Buist S, Anderson P, Nides M et al. Smoking cessation in patients with chronic obstructive pulmonary disease: a double-blind, placebo-controlled, randomised trial. Lancet 2001; 357:1571-1575. 16. Wagena EJ, Knispchild PG, Huibers MJ, Wouters EF, van Schayk CP. Efficacy of bupropión and nortriptyline for smo-
33