1. University of California, San Diego, La Jolla, California
2. New England Research Institutes, Watertown, Massachusetts
3. University of Alabama at Birmingham, Birmingham, Alabama
4. University of Texas, Southwestern, Dallas, Texas
5. William Beaumont Hospital, Royal Oak, Michigan
6. University of Maryland, Baltimore, Maryland
7. University of Utah, Salt Lake City, Utah
8. University of Texas at San Antonio, San Antonio, Texas
9. University of Pittsburgh, Magee-Womens Hospital, Pittsburgh, Pennsylvania
10. Loyola University Chicago, Chicago, Illinois
11. Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
12. National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland