1. Boston University School of Medicine; Boston Massachusetts
2. University of California; San Francisco
3. University Hospital Zurich; University of Zurich; Zurich Switzerland
4. University of California; Davis
5. University of Kansas Medical Center; Kansas City
6. Tufts Medical Center; Boston Massachusetts
7. University of Alabama at Birmingham
8. Boston University School of Medicine, Boston, Massachusetts; and NIHR Manchester Musculoskeletal Biomedical Research Centre; University of Manchester; Manchester UK