Plasma levels of lipoprotein (a) are elevated in patients with antiphospholipid antibody syndrome - Yamazaki, M; Asakura, H; Jokaji, H; Saito, M; Uotani, C; Kumabashiri, I; Morishita, E; Aoshima, K; Ikeda, T; Matsuda, T (Thromb Haemost, 1994)