title: Introduction.
authors.affiliation: Vancouver, BC, Canada.
authors.forename: Alastair
authors.initials: A
authors.lastname: Carruthers
authors.forename: Jean
authors.initials: J
authors.lastname: Carruthers
mesh_terms: D019274:Botulinum Toxins, Type A / Q000627:therapeutic use*; D017277:Drug Approval; D006801:Humans; D009498:Neurotoxins / Q000627:therapeutic use*
chemical_list: D009498:Neurotoxins; D019274:Botulinum Toxins, Type A