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