Efficacy and safety of purified botulinum toxin type A (Dysport) for the treatment of benign essential blepharospasm: a randomized, placebo-controlled, phase II trial - Truong, D; Comella, C; Fernandez, H H; Ondo, W G (Parkinsonism Relat Disord, 2008)
; Dysport Benign Essential Blepharospasm Study Group.