1. Hebrew Rehabilitation Hospital, Boston, Massachusetts
2. University of Chicago Medicine, Chicago, Illinois
3. University of California Davis, Sacramento, California
4. Harvard Pilgrim Health Care Institute, Harvard Medical School, Boston, Massachusetts
5. Harvard Medical School, Boston, Massachusetts
6. Johns Hopkins University School of Medicine, Baltimore, Maryland
7. Evidence-Based Practice Center, Mayo Clinic, Rochester, Minnesota
8. Centre Hospitalier Universitaire Dijon Bourgogne, Dijon, France