1. Department of Pulmonology and Thoracic Surgery, Lung Clinic, Tartu University Hospital, Tartu, Estonia
2. Department of Radiotherapy and Oncotherapy, Haematology–Oncology Clinic, Tartu University Hospital, Tartu, Estonia
3. Faculty of Medicine, University of Tartu, Tartu, Estonia
4. Department of Pathology, Tartu University Hospital, Tartu, Estonia