title: Botulinum toxins. Introduction.
authors.forename: A W
authors.initials: AW
authors.lastname: Klein
mesh_terms: D019274:Botulinum Toxins, Type A / Q000266:history / Q000627:therapeutic use*; D003357:Cosmetic Techniques; D005152:Facial Muscles / Q000187:drug effects*; D049673:History, 20th Century; D006801:Humans; D007273:Injections, Intramuscular; D009465:Neuromuscular Agents / Q000266:history / Q000627:therapeutic use*; D015595:Skin Aging / Q000187:drug effects*
chemical_list: D009465:Neuromuscular Agents; D019274:Botulinum Toxins, Type A