1. 1 Department of Anaesthesiology and Intensive Care, Division of Teaching , Medical University of Warsaw , Poland
2. 2 2nd Department of Anesthesiology and Intensive Care , Medical University of Warsaw, Medical University of Warsaw , Poland
3. 3 Department of Descriptive and Clinical Anatomy , Medical University of Warsaw , Poland
4. 4 Department of Clinical Nursing , Medical University of Warsaw , Poland
5. 5 Student of Medical University of Warsaw, Medical University of Warsaw , Poland