1 Cancer Center, Vaasa Central Hospital, Vaasa, Finland; Department of Clinical Oncology, University of Turku, Turku, Finland; Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland. Electronic address: heidi.andersen@tuni.fi.
2 Finnish Lung Health Association, Helsinki, Finland.
3 Research Unit of Biomedicine and Internal Medicine, University of Oulu, Oulu, Finland; Center of Internal Medicine and Respiratory Medicine, and Medical Research Center Oulu, Oulu University Hospital, Oulu, Finland.
4 Cancer Center, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.
5 Pathology, University of Helsinki and Helsinki University Hospital Diagnostic Center (HUSLAB), Helsinki, Finland.
6 Department of Surgery, Central Hospital of Central Finland, Jyväskylä, Finland.
7 Finnish Lung Health Association, Helsinki, Finland; Department of Pulmonary Diseases and Clinical Allergology, University of Turku, Turku, Finland.