1. Department of Anesthesiology, Olive View-UCLA Medical Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
2. Department of Anesthesiology & Pain Medicine, University of Washington School of Medicine, Seattle, Washington
3. Department of Anesthesiology, St. Louis University School of Medicine, St. Louis, Missouri
4. Department of Anesthesiology, Mayo Clinic Arizona, Phoenix, Arizona