1. Mayo Clinic College of Medicine and Science, Rochester, Minnesota; San Raffaele University, Milan, Italy; and Santa Chiara Hospital; Trento Italy
2. University of Michigan Medical School; Ann Arbor
3. Mayo Clinic College of Medicine and Science, Rochester, Minnesota; and Université de Bretagne Occidentale, CHU de Brest; Brest France
4. Mayo Clinic College of Medicine and Science; Rochester Minnesota
5. Cleveland Clinic; Cleveland Ohio
6. University Medical Center Groningen; Groningen The Netherlands
7. Johns Hopkins University; Baltimore Maryland
8. Hospital for Special Surgery; New York New York
9. Duke University Medical Center; Durham North Carolina
10. Genentech; South San Francisco California
11. Massachusetts General Hospital; Boston
12. University of Pennsylvania; Philadelphia
13. Boston University and VA Boston Healthcare System; Boston Massachusetts