[1] Boston University,Section of General Internal Medicine, Department of Medicine
[2] Chobanian & Avedision School of Medicine and Boston Medical Center,New England Geriatric Research Education and Clinical Center
[3] Veterans Affairs Boston Healthcare System,Department of Rehabilitation Science
[4] MGH Institute of Health Professions,Department of Anesthesiology and Pain Medicine
[5] University of Washington,Department of Physical Therapy
[6] Mongan Institute,Department of Physical Medicine and Rehabilitation
[7] Massachusetts General Hospital and Harvard Medical School,undefined
[8] MGH Institute of Health Professions,undefined
[9] Harvard Medical School,undefined
[10] Spaulding Rehabilitation Hospital,undefined