Effects of aspirin for primary prevention in persons with diabetes mellitus by Bowman, L, Mafham, M, Wallendszus, K, Stevens, W, Buck, G, Barton, J, Murphy, K, Haynes, R, Jolyon, R, Murawska, A, Young, A, Lay, M, Chen, F, Sammons, E, Waters, E, Simpson, D, Peto, R, Baigent, C, Collins, R, Parish, S, Armitage, J, Farmer, A, Neil, A, Ascend Study Collaborative Group