title: Myositis or myopathy.
authors.forename: R L
authors.initials: RL
authors.lastname: Wortmann
mesh_terms: D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D006012:Glycogen Storage Disease Type V / Q000175:diagnosis; D006801:Humans; D009135:Muscular Diseases / Q000175:diagnosis*; D009220:Myositis / Q000175:diagnosis*