Anticardiolipin antibodies (ACA) directed not to cardiolipin but to a plasma protein cofactor - Galli, M; Comfurius, P; Maassen, C; Hemker, HC; DeBaets, MH; Breda-Vriesman van, PJC; Barbui, T; Zwaal, RFA; Bevers, EM (Lancet, 1990)