title: Weak at the knees.
authors.affiliation: Royal Free Hospital, London, UK.
authors.forename: G
authors.initials: G
authors.lastname: Webster
authors.forename: H
authors.initials: H
authors.lastname: Beynon
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D006801:Humans; D007717:Knee; D008297:Male; D018908:Muscle Weakness / Q000209:etiology*; D018979:Myositis, Inclusion Body / Q000175:diagnosis*