Affiliation: | a University of Tampere, Department of Nursing Science, Niittytie 1, FI-33470 Ylöjärvi, Finland b Turku University Hospital, FI-20521 Turku, Finland c University of Turku, Turku University Hospital, FI- 20521 Turku, Finland d Department of Health and Functional Capacity, National Institute for Health and Welfare, FI-00300 Helsinki, Finland e Department of Epidemiology and Health Promotion, National Institute for Health and Welfare, FI-00300 Helsinki, Finland f Department of Respiratory Diseases, Tampere University Hospital, FI-33521 Tampere, Finland |