1. Department of Pharmacotherapy, Virginia Commonwealth University, Medical College of Virginia, Richmond, Virginia.
2. Department of Outcomes Sciences Neurosurgery, Virginia Commonwealth University, Medical College of Virginia, Richmond, Virginia.
3. Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California.
4. Nursing Services, UI Heart and Vascular Center, University of Iowa Hospitals and Clinics, Iowa City, Iowa.
5. Air Methods/Life Evac of Virginia, Richmond, Virginia.