OP0241 SAFETY AND EFFICACY OF LENABASUM IN AN OPEN-LABEL EXTENSION OF A PHASE 2 STUDY OF LENABASUM IN REFRACTORY SKIN-PREDOMINANT DERMATOMYOSITIS (DM) SUBJECTS - Werth, Victoria; Pearson, David; Owaka, Joyce; Feng, Rui; Concha, Josef Simon; Patel, Basil; Hejazi, Emily; Cornwall, Caitlin; Constantine, Scott; Dgetluck, Nancy; White, Barbara (Annals of the rheumatic diseases, 2019)