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; van Breda-Vriesman, P J C; Barbui, T; Zwaal, R F; Bevers, E M (Lancet, 1990)