title: Author Response.
authors.forename: Angelo
authors.initials: A
authors.lastname: Antonini
authors.forename: Roger
authors.initials: R
authors.lastname: Albin
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000503:physiopathology*; D009043:Motor Activity / Q000502:physiology*; D009069:Movement Disorders / Q000503:physiopathology*; D010300:Parkinson Disease / Q000503:physiopathology*; D012720:Severity of Illness Index