| Affiliation: | (1) Institute of Occupational and Environmental Medicine, University of Birmingham, Edgbaston, Birmingham, UK;(2) Cancer Center, Ramathibodhi Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand;(3) Department of Occupational Health and Safety, Faculty of Public Health, Mahidol University, Bangkok, Thailand;(4) Respiratory Medicine Unit, Dept. of Internal Medicine, Institute of Clinical Medicine, University of Oulu, P.O. Box 5000, FI, 90014;(5) University of Oulu, Oulu, Finland;(6) Oulu University Hospital, Oulu, Finland |
