1 Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, Roentgen Str 5, 02-781, Warsaw, Poland. piotr.rutkowski@pib-nio.pl.
2 Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, Roentgen Str 5, 02-781, Warsaw, Poland.