title: Introduction.
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Beer
mesh_terms: D019274:Botulinum Toxins, Type A / Q000627:therapeutic use; D003357:Cosmetic Techniques; D004954:Esthetics; D005138:Eyebrows / Q000033:anatomy & histology* / Q000502:physiology; D005145:Face; D006197:Hair / Q000254:growth & development / Q000502:physiology; D006801:Humans; D007039:Hypotrichosis / Q000188:drug therapy; D009465:Neuromuscular Agents / Q000627:therapeutic use; D009915:Orbit
chemical_list: D009465:Neuromuscular Agents; D019274:Botulinum Toxins, Type A