Anticardiolipin antibodies (ACA) are directed not to a cardiolipin but to a plasma protein co-factor - Galli, M; Comfurius, P; Maasen, C; Hemker, H C; De Baets, H M; Van Breda-Vriesman, P JC; Barbui, T; Zwaal, R FA; Bevers, E M (Lancet, 1990)