1. Department of Medical Laboratory Diagnostics, Division of Clinical Chemistry and Laboratory Haematology, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland
2. Grzegorz Marek (GM) Second Department and Clinic of General and Oncological Surgery, Wrocław Medical University, Borowska 213, 50-556 Wrocław, Poland