Mendelian randomization study of the relevance of blood pressure to vascular mortality among 150,000 participants in the Mexico City Prospective Study by Turner, M, Alegre-Diaz, J, Berumen, J, Torres, JM, Haynes, RJ, Herrington, WG, Staplin, N, Emberson, JE, Kuri-Morales, P, Tapia-Conyer, R, Mexico City Prospective Study