Comparing the autoantibody levels and clinical efficacy of double filtration plasmapheresis, immunoadsorption, and intravenous immunoglobulin for the treatment of late-onset myasthenia gravis - Liu, JF; Wang, WX; Xue, J; Zhao, CB; You, HZ; Lu, JH; Gu, Y (Ther Apher Dial, 2010)