1. Duke University; Durham; North Carolina
2. Pfizer Global Research and Development; Groton; Connecticut
3. Optasia Medical; Manchester; UK
4. Paracelsus Medical University, Salzburg, Austria, and Chondrometrics GmbH; Ainring; Germany
5. New England Baptist Hospital, Boston, Massachusetts, and University of Sydney; Sydney; Australia
6. University of California at Davis Medical Center; Sacramento
7. University of Arizona; Tucson
8. Northwestern University; Chicago; Illinois