Effects of N-acetylcysteine on outcomes in chronic obstructive pulmonary disease (Bronchitis Randomized on NAC Cost-Utility Study, BRONCUS): A randomised placebo-controlled trial: The Lancet 2005;365(9470):1552–60 - Decramer, M.; Rutten-van Mölken, M.; Dekhuijzen, P.N.R.; Troosters, T.; van Herwaarden, C.; Pellegrino, R.; Ovan Schayck, C.P.; Olivieri, D.; Del Donno, M.; De Backer, W.; al., et (Respiratory Medicine: COPD Update, 2005)