Erratum to: Botulinum Toxin Injection for Treatment of Chronic Anal Fissure: Is There Any Dose-Dependent Efficiency? A Meta-Analysis. - Bobkiewicz, Adam; Francuzik, Wojciech; Krokowicz, Lukasz; Studniarek, Adam; Ledwosiński, Witold; Paszkowski, Jacek; Drews, Michal; Banasiewicz, Tomasz (World Journal of Surgery, 2016)