Anticardiolipin antibodies possess anticoagulant activity which is blocked by a monoclonal antibody against a cross reacting idiotype of antiphospholipid antibodies - Valesini, G; Violi, F; Ferro, D; Quintarelli, C; Falco, M; Tincani, A; Balestrieri, G; Balsano, F (Clin Exp Rheum, 1989)