title: Slippery slopes.
authors.forename: Donald R
authors.initials: DR
authors.lastname: Royall
mesh_terms: D003072:Cognition Disorders / Q000175:diagnosis* / Q000503:physiopathology*; D003863:Depression / Q000175:diagnosis*; D005684:Gait / Q000502:physiology*; D006801:Humans; D008487:Medical History Taking