1. Columbia University College of Physicians and Surgeons, New York, New York, and Corrona; Southborough Massachusetts
2. Amgen; Thousand Oaks California
3. Albany Medical Center, Albany, New York, and Corrona; Southborough Massachusetts
4. Corrona, Southborough, and University of Massachusetts; Worcester Massachusetts
5. Corrona; Southborough Massachusetts
6. Corrona, Southborough, Massachusetts, and New York University School of Medicine; New York
7. University of Alabama at Birmingham