“…[6][7][8] DFPP, which we propose as a treatment for refractory RA, selectively removes high molecular-weight substances such as immunoglobulins, immune complexes, and lipoproteins 11 and has several advantages over PE. 8 DFPP has been reported to be helpful for renal transplant recipients, [12][13][14] Guillain-Barre syndrome, [15][16][17] myasthenia-gravis, 18,19 and systemic lupus erythematosus. 20 In 1 study of plasmapheresis for myasthenia gravis, PE and DFPP showed comparable abilities to remove acetylcholine receptor antibodies.…”