title: Reflections on a half century as we approach the millennium.
authors.forename: R W
authors.initials: RW
authors.lastname: Mann
mesh_terms: D005544:Forecasting; D006801:Humans; D010810:Physical and Rehabilitation Medicine / Q000639:trends*; D012046:Rehabilitation / Q000639:trends*; D012106:Research / Q000639:trends*