Effects of calcium antagonists on the risks of coronary heart disease, cancer and bleeding by Alderman, M, Arakawa, K, Beilin, L, Chalmers, J, Cohn, J, Collins, R, Fenichel, R, Frohlich, E, Hamet, P, Hansson, L, Hennekens, C, Kuschnir, E, Liu, L, MacMahon, S, Mancia, G, Martin, I, Menard, J, Sleight, P, Whitworth, J, Yusuf, S, Zanchetti, A