1. Department of Surgery, Norwalk Hospital, Norwalk, Connecticut.
2. Department of Gastroenterology, Norwalk Hospital, Norwalk, Connecticut.
3. Department of Neuroscience, Hamilton College, Clinton, New York.
4. The Dartmouth Institute, Dartmouth College, Hanover, New Hampshire.
5. Department of Radiology, Norwalk Hospital, Norwalk, Connecticut.
6. Department of Surgery, Ingham Medical Hospital, Lansing, Michigan.