A 2-Part Seamless Part A (Phase 2)/Part B (Phase 3) Randomized Double-Blind Placebo-Controlled Multicenter Study to Evaluate the Efficacy and Safety of BIIB059 in Participants with Active Subacute Cutaneous Lupus Erythematosus and/or Chronic Cutaneous Lupus Erythematosus with or without Systemic Manifestations and Refractory and/or Intolerant to Antimalarial Therapy (AMETHYST)



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