1. Department of Pneumology and Phthisiology, Faculty of Medicine in Pilsen, Charles University, 305 99 Pilsen, Czech Republic
2. Department of Oncology and Radiotherapy, Faculty of Medicine in Pilsen, Charles University, 305 99 Pilsen, Czech Republic
3. Institute of Biostatistics and Analyses Ltd., 625 00 Brno, Czech Republic
4. Department of Pathology, Faculty of Medicine in Pilsen, Charles University, 305 99 Pilsen, Czech Republic