1. University of California; San Diego, La Jolla California
2. New England Research Institutes; Watertown Massachusetts
3. Loyola University of Chicago Stritch School of Medicine; Maywood Illinois
4. University of Texas Southwestern, Dallas; Dallas Texas
5. University of Utah; Salt Lake City, Utah
6. University of Texas Health Science Center; San Antonio Texas
7. University of Pittsburgh; Pittsburgh Pennysylvania
8. William Beaumont Hospital; Royal Oak, Michigan