Association of MRI findings and serum autoantibodies in diffuse neuropsychiatric systemic lupus erythematosus. Association of MRI findings and serum autoantibodies in diffuse neuropsychiatric systemic lupus erythematosus. Anti-PL, anti-phospholipid antibody; anti-ribo P, anti-ribosomal P protein antibody. Anti-PL included anticardiolipin IgG antibody, anti-cardiolipin β2 glycoprotein I antibody and/or lupus anticoagulant. Statistical significance was evaluated by Mann-Whitney U test. Yoshiyuki Arinuma et al. Lupus Sci Med 2014;1:e000050 ©2014 by Lupus Foundation of America