1. Center for Resuscitation Science, Department of Emergency Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
2. School of Nursing, University of Pennsylvania, Philadelphia, PA
3. North York General Hospital, University of Toronto, Ontario, Canada
4. University of Pittsburgh, PA
5. Department of Emergency Medicine, University of Alabama and Alabama Resuscitation Center, Birmingham, AL
6. Vanderbilt University School of Nursing, Nashville, TN
7. Michigan State University College of Human Medicine, Grand Rapids, MI