Anticardiolipin antibodies (ACA) are directed not to a cardiolipin but to a plasma protein co-factor - Galli, M; Comfurius, P; Maassen, C; Hemker, H C; de Baets, H M; van Breda-Vriesman, PJ C; Barbui, T; Zwaal, RF A; Bevers, E M (Lancet, 1990)