1. Fourth Military Teaching Hospital, Department of Surgery, Wroclaw, Poland + Wroclaw Medical University, Faculty of Health Science, Department of Clinical Nursing, Wroclaw, Poland
2. Wroclaw Medical University, Faculty of Medicine, Department of Internal Medicine and Hypertension, Wroclaw, Poland
3. Fourth Military Teaching Hospital, Department of Surgery, Wroclaw, Poland
4. Wroclaw Medical University, Faculty of Medicine, Department of Pathology, Wroclaw, Poland