Anticardiolipin antibodies (ACA) directed not to cardiolipin but to a plasma protein cofactor - Galli, M; Comfurius, P; Maassen, C; Hemker, H C; De, Baets M H; Van, Brieda-Vriesman PJC; Barbui, T; Zwaal, R FA; Bevers, E M (Lancet, 1990)