Long-term efficacy and safety of abobotulinumtoxinA solution for the treatment of moderate-to-severe glabellar lines: A Phase III, double-blind, placebo-controlled and open-label repeat injection study. (January 2021) - Kestemont, Philippe; Hilton, Said; Andriopoulos, Bill; Prygova, Inna; Thompson, Catherine; Volteau, Magali; Ascher, Benjamin