1. Department of Surgical Nursing, Medical University of Gdańsk, 80-211 Gdańsk, Poland
2. Laboratory of Microbiology, Medical Diagnostic Laboratories Invicta, 81-740 Sopot, Poland
3. Department of Oncology, Transplantation and General Surgery, University Clinical Centre of Gdańsk, 80-952 Gdańsk, Poland
4. Department of Anaesthesiology Nursing and Intensive Care, Medical University of Gdańsk, 80-211 Gdańsk, Poland