The anti-beta2-glycoprotein I activity in human antiphospholipid syndrome sera is due to monoreactive low-affinity autoantibodies directed to epitopes located on native beta2 glycoprotein I and preserved during species evolution - Tincani, A; Spatola, L; Prati, E; Allegri, F; Ferremi, P; Cattaneo, R; Meroni, PL; Balestrieri, G (J Immunol, 1996)