title: The 'risus sardonicus' of multiple system atrophy.
authors.forename: Gregor K
authors.initials: GK
authors.lastname: Wenning
authors.forename: Felix
authors.initials: F
authors.lastname: Geser
authors.forename: Werner
authors.initials: W
authors.lastname: Poewe
mesh_terms: D004421:Dystonia / Q000150:complications; D005152:Facial Muscles / Q000002:abnormalities*; D005260:Female; D006801:Humans; D019578:Multiple System Atrophy / Q000150:complications / Q000175:diagnosis*; D020734:Parkinsonian Disorders / Q000175:diagnosis*