1. Radiation Oncology Department, West Pomeranian Oncology Center, Strzałowska 22, 71-730 Szczecin, Poland
2. Hospicjum Św. Jana Ewnagelisty, Pokoju 77, 71-740 Szczecin, Poland
3. Department of General, Minimally Invasive, and Gastroenterological Surgery, Pomeranian Medical University in Szczecin, 71-252 Szczecin, Poland