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BRIEF COMMUNICATIONS Potentiation of Vitamin K Pulse high-dose intravenous methylprednisolone Antagonists by High-Dose is widely used for the treatment of flares in Intravenous Methylprednisolone inflammatory and autoimmune diseases (1). Most ofthese diseases carry a risk for venous and arterialocclusion (2–4). In addition, patients may have in-dividual indications for oral antico