1. Paracelsus Medical University, Salzburg and Nuremberg, Austria, and Chondrometrics Freilassing Germany
2. Boston University School of Medicine, Boston, Massachusetts, and VA Boston Healthcare System West Roxbury Massachusetts
3. Royal North Shore Hospital and University of Sydney St. Leonards New South Wales Australia
4. University of Arizona College of Medicine Tucson
5. University of California San Francisco
6. Boston University School of Medicine, Boston, Massachusetts, and Universitätsklinikum Erlangen and Friedrich‐Alexander University Erlangen–Nuremberg Erlangen Germany