PT - JOURNAL ARTICLE AU - L L Simpson TI - The origin, structure, and pharmacological activity of botulinum toxin. DP - 1981 Sep 01 TA - Pharmacological Reviews PG - 155--188 VI - 33 IP - 3 4099 - http://pharmrev.aspetjournals.org/content/33/3/155.short 4100 - http://pharmrev.aspetjournals.org/content/33/3/155.full SO - Pharmacol Rev1981 Sep 01; 33