[1] Natl Res Ctr Working Environm, Copenhagen, Denmark
[2] Aarhus Univ, Dept Publ Hlth, Environm Occupat & Hlth, Aarhus, Denmark
[3] Univ Bergen, Ctr Int Hlth, Bergen, Norway
[4] Uppsala Univ, Dept Med Sci Clin Physiol, Uppsala, Sweden
[5] Landspitali Univ Hosp, Dept Allergy Resp Med & Sleep, Reykjavik, Iceland
[6] Univ Iceland, Fac Med, Reykjavik, Iceland
[7] Umea Univ, Dept Publ Hlth & Clin Med, Div Occupat & Environm Med, Umea, Sweden
[8] Uppsala Univ, Dept Med Sci Resp Allergy & Sleep Res, Uppsala, Sweden
[9] Monash Univ, Melbourne, Vic, Australia
[10] Hosp Gen Univ, Serv Neumol, Albeceta, Sweden
[11] Univ Huelva, Dept Nursing, Ave Tres Marzo S-N, Huelva 21071, Spain
[12] ISGlobal, Barcelona, Spain
[13] Univ Gothenburg, Inst Med, Dept Publ Hlth & Community Med, Gothenburg, Sweden
[14] Umea Univ, Dept Publ Hlth & Clin Med, Umea, Sweden
[15] Univ Gothenburg, Sahlgrenska Acad, Occupat & Environm Med, Gothenburg, Sweden
[16] Tartu Univ Hosp, Lung Clin, Tartu, Estonia
[17] Univ Bergen, Dept Clin Sci, Bergen, Norway
[18] Aarhus Univ, Natl Ctr Register Based Res, Dept Econ & Business Econ, Aarhus, Denmark
[19] Univ Melbourne, Melbourne Sch Populat & Global Hlth, Melbourne, Vic, Australia