1. The Surgical Simulation Laboratory, National Capital Area Medical, Simulation Center, Uniformed Services University 4301 Jones Bridge Road, Bethesda, MD 20814,
2. Department of Surgery, University of California San Francisco
3. Imaging Science and Information, Systems Center, Department of Radiology, Georgetown University Medical, Center
4. The Surgical Simulation Laboratory, National Capital Area Medical, Simulation Center, Uniformed Services University