 - Any previous use of Botox, Dysport or Myobloc. Previous use of Botox Cosmetic or Myobloc for cosmetic purposes is allowed if the last administration occurred over 6 months prior to enrollment and the injected dose was less than or equal to 30 units or an equivalent dose of Myobloc. Copies of all records of Botox Cosmetic or Myobloc injections must be provided by the subject prior to enrollment for verification. 