Anticardiolipin antibodies (ACA) directed not to cardiolipin but to a plasma cofactor - Galli, M; Comfurius, P; Maassen, C; Hemker, H C; deBaets, M H; van Breda-Vriesman, P JC; Barbui, T; Zwaal, R FA; Bevers, E M (Lancet, 1990)