1. CONRAD Clinical Research Center, Eastern Virginia Medical School, Norfolk, Virginia.
2. V.A. Medical Center, White River Junction, Vermont.
3. Geisel School of Medicine at Dartmouth, Hanover, New Hampshire.
4. Albert Einstein College of Medicine, Bronx, New York.
5. Alpha StatConsult, Damascus, Maryland.
6. Center for Health Analytics and Discovery, Eastern Virginia Medical School, Norfolk, Virginia.
7. Magee-Womens Research Institute, Pittsburgh, Pennsylvania.
8. University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.