1. Safar Center for Resuscitation Research, University of Pittsburgh School of Medicine, Pittsburgh, PA
2. VU University Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA
3. UPMC Mercy Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA
4. Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA
5. Department of Emergency Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA
6. Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA