Apo(a) isofoims predict risk for coronary heart disease. A study in six populations. - Shandholzer, C; Saha, N; Kark, J D; Rees, A; Jaross, W; Dieplinger, H; Hoppichler, F; Boerwinkle, E; Utermann, G (Arteriosclerosis and Thrombosis, 1992)