title: Invited commentary.
authors.affiliation: Health & Disability Institute, and Professor of Health Policy & Management, School of Public Health, Boston University, 580 Harrison Ave, 4th Floor, Boston, MA 02118 (USA).
authors.forename: Alan M
authors.initials: AM
authors.lastname: Jette
mesh_terms: D004185:Disability Evaluation; D006305:Health Status Indicators; D006801:Humans; D015588:Observer Variation; D026741:Physical Therapy Modalities; D015203:Reproducibility of Results; D020521:Stroke / Q000503:physiopathology; D000071939:Stroke Rehabilitation; D016896:Treatment Outcome