1. Department of Internal Medicine, MedStar Washington Hospital Center, Washington, District of Columbia.
2. Department of General Surgery, MedStar Washington Hospital Center, Washington, District of Columbia.
3. Department of Radiology, Mercy Fitzgerald Hospital, Darby, Pennsylvania.
4. Division of Neurological Surgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona.
5. Department of Endocrinology, Medstar Washington Hospital Center, Washington, District of Columbia.
6. Department of Nuclear Medicine, Medstar Washington Hospital Center, Washington, District of Columbia.
7. Department of Surgery, MedStar Georgetown University Hospital, Washington, District of Columbia.