1 Safar Center for Resuscitation Research, Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh School of Medicine, UPMC Presbyterian Hospital, 200 Lothrop St., Suite C-200, Pittsburgh, PA 15213, United States. Electronic address: drabekt@anes.upmc.edu.
2 Department of Emergency Medicine and Division of EMS, Life Lion Critical Care Transport, Penn State College of Medicine, Penn State Health Hershey Medical Center, 500 University Dr., Hershey, PA 17933, United States. Electronic address: gcavaliere@pennstatehealth.psu.edu.