1. Queens University, Kingston, Ontario, Canada
2. University of Pennsylvania, Philadelphia, Pennsylvania
3. Henry Ford Hospital, Detroit
4. Yale University, New Haven, Connecticut
5. University of Rochester, Rochester, New York
6. Stanford University, Stanford, California
7. William Beaumont Hospital, Royal Oak, Michigan
8. National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland