[Systematic Literature Review]. AbobotulinumtoxinA in Clinical Trials for Adult Upper Limb Spasticity.

…On the basis of data extracted from 12 randomized clinical studies, a strong evidence base (9/12 studies) exists for the use of ABO to reduce ULS caused by stroke…

http://journals.lww.com/ajpmr/Abstract/publishahead/Systematic_Literature_Review_of_AbobotulinumtoxinA.99185.aspx