1 Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, USA; Department of General Anesthesiology, Anesthesiology Institute, Cleveland Clinic, Cleveland, USA.
2 Department of Emergency Medical Service, Wroclaw Medical University, Wroclaw, Poland.
3 Faculty of Medicine, Lazarski University, Warsaw, Poland.
4 Hunter Holmes McGuire VA Medical Center, Department of Surgery, Richmond, United States. Electronic address: eurekaplus@gmail.com.