249. IMPROVEMENTS AND CORRELATIONS IN ORAL ULCERS, DISEASE ACTIVITY, AND QOL IN BEHÇET'S SYNDROME PATIENTS TREATED WITH APREMILAST: A PHASE 3 RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED STUDY. (29th March 2019) - Hatemi, Gülen; Mahr, Alfred; Takeno, Mitsuhiro; Kim, Doyoung; Melikoglu, Melike; Cheng, Sue; McCue, Shannon; Paris, Maria; Chen, Mindy; Yazici, Yusuf