1 Department of Surgery Teaching, Wroclaw Medical University, Wrocław, Poland; Lower Silesian Oncology, Pulmonology and Hematology Center, Wrocław, Poland. micapo@interia.pl
2 Lower Silesian Oncology, Pulmonology and Hematology Center, Wrocław, Poland
3 Faculty of Medicine, Wroclaw Medical University, Wrocław, Poland
4 Department of Oncology, Wroclaw Medical University, Wrocław, Poland