1. Anesthesiologist and Intensivist.
2. Senior Anesthesiologist and Intensivist, Department of Anesthesia and Critical Care.
3. Senior Anesthesiologist and Intensivist, Department of Cardiac Anesthesia, Regional Medical Centre, Opole, Poland.
4. Assistant Professor, Hugo Steinhaus Center, Institute of Mathematics and Computer Science, Wroclaw University of Technology, Wroclaw, Poland.