1 Department of Emergency Medical Service, Wroclaw Medical University, Wroclaw, Poland.
2 Department of Emergency Medicine, Medical University of Warsaw, Warsaw, Poland. Electronic address: lukasz.szarpak@gmail.com.
3 Department of Clinic of Gastroenterology and Hepatology, Wroclaw Medical University, Wroclaw, Poland.
4 Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, USA.
5 Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, USA; Department of General Anesthesiology, Anesthesiology Institute, Cleveland Clinic, Cleveland, USA.