1. Jagiellonian University Medical College, Krakow, Poland.
2. Department of Radiotherapy I, Maria Skłodowska-Curie National Research Institute of Oncology, Warszawa, Poland.
3. Department of Clinical Oncology, St. Lukas Hospital, Tarnow, Poland.
4. Department of Clinical Oncology with BCU, Pomeranian Hospitals, Gdynia, Poland.
5. Department of Clinical Oncology, Maria Skłodowska-Curie National Research Institute of Oncology, Krakow Branch, Krakow, Poland.