Cited 8 times since 2007 (0.5 per year) source: EuropePMC The European respiratory journal, Volume 30, Issue 4, 1 1 2007, Pages 810-812 Variation in the tumour necrosis factor gene is not associated with susceptibility to COPD. Chappell S, Daly L, Morgan K, Baranes TG, Roca J, Rabinovich R, Millar A, Donnelly SC, Keatings V, Macnee W, Stolk J, Hiemstra PS, Miniati M, Monti S, O'Connor CM, Kalsheker N