1. Rhode Island Hospital/Alpert Medical School; Brown University; Providence Rhode Island
2. Boston Medical Center; Boston University School of Medicine; Boston Massachusetts
3. Alliance Statistics and Data Center; Mayo Clinic; Rochester Minnesota
4. Radiological Associates; Massachusetts General Hospital; Boston Massachusetts
5. Medical College of Wisconsin; Milwaukee Wisconsin
6. Johns Hopkins Medical Center; Johns Hopkins Hospital; Baltimore Maryland
7. Vanderbilt University Medical Center; Vanderbilt Clinic; Nashville Tennessee