Author's Reply to: "Concerns Over: Efficacy and Safety of 0.1% Cyclosporine a Cationic Emulsion in the Treatment of Severe Dry Eye Disease". Issue 6 (8th November 2017) - Leonardi, Andrea; Van Setten, Gysbert; Amrane, Mourad; Ismail, Dahlia; Garrigue, Jean-Sebastien; Figueiredo, Francisco C.; Baudouin, Christophe