1. Department of Radiology, Copernicus Memorial Hospital, Lodz, Poland
2. Department of Biostatistics and Translational Medicine, Medical University of Lodz, Lodz, Poland
3. Department of Radiotherapy, Chair of Oncology, Medical University of Lodz, Lodz, Poland
4. Department of Teleradiotherapy, Regional Cancer Centre, Copernicus Memorial Hospital of Lodz, Lodz, Poland