[1] Helmholtz Zentrum Munchen, Inst Lung Biol & Dis, Comprehens Pneumol Ctr, Munich, Germany
[2] Swiss Trop & Publ Hlth Inst, Dept Epidemiol & Publ Hlth, Basel, Switzerland
[3] Univ Basel, Fac Med, Basel, Switzerland
[4] Fdn Jean Dausset, INSERM, CEPH, U946, Paris, France
[5] Imperial Coll London, Dept Epidemiol & Biostat, London, England
[6] Imperial Coll London, Dept Resp Epidemiol, London, England
[7] Helmholtz Zentrum Munchen, Inst Epidemiol 1, Munich, Germany
[8] Helmholtz Zentrum Munchen, Inst Epidemiol 2, Munich, Germany
[9] Inst Albert Bonniot, INSERM, U823, Grenoble, France
[10] INSERM, Resp & Environm Epidemiol Team, UMRS 1018, Villejuif, France
[11] Univ Hosp, Div Pulm, Geneva, Switzerland
[12] St Georges Univ, Dept Community Hlth Sci, London, England