1. Clinical Nursing Unit, Nursing and Obstetrics Institute, Faculty of Health Sciences, Jagiellonian University Medical College, Krakow, Poland
2. 1st Department of General, Oncological and Gastrointestinal Surgery, Jagiellonian University Medical College, Krakow, Poland
3. 2nd Department of Surgery, Jagiellonian University Medical College, Krakow, Poland
4. Baystate Medical Centre, Springfield, Massachusetts, USA