1. University Hospitals Case Medical Center; Case Western Reserve University; Cleveland OH USA
2. Massachusetts General Hospital; Boston MA USA
3. University of Pennsylvania; Philadelphia PA USA
4. Stanford University School of Medicine; Stanford CA USA
5. Weill Cornell Medical College; New York NY USA
6. University of Pittsburgh Medical Center; Pittsburgh PA USA
7. University of Texas Health Science Center; San Antonio TX USA
8. Biostatistics Center; Massachusetts General Hospital; Boston MA USA
9. Harvard Clinical Research Institute; Boston MA USA
10. Mount Sinai School of Medicine; New York NY USA