[1] Univ Helsinki, Cent Hosp, HUS Med Diagnost Ctr, Dept Clin Physiol, Helsinki, Finland
[2] Univ Helsinki, Helsinki, Finland
[3] Finnish Inst Occupat Hlth, Helsinki, Finland
[4] Helsinki Univ Hosp, Dept Pulm Med, Heart & Lung Ctr, Helsinki, Finland
[5] Norwegian Univ Sci & Technol, NTNU, Dept Publ Hlth & Nursing, HUNT Res Ctr, Levanger, Norway
[6] Nord Trondelag Hosp Trust, Levanger Hosp, Levanger, Norway
[7] Univ Gothenburg, Inst Med, Dept Internal Med & Clin Nutr, Krefting Res Ctr, Gothenburg, Sweden
[8] Seinajoki Cent Hosp, Dept Resp Med, Seinajoki, Finland
[9] Tampere Univ, Fac Med & Hlth Technol, Resp Res Grp, Tampere, Finland
[10] Umea Univ, Sect Sustainable Hlth, Dept Publ Hlth & Clin Med, OLIN Unit, Umea, Sweden