CAST: Randomised placebo-controlled trial of early aspirin use in 20,000 patients with acute ischaemic stroke - Chen, Z; Hui, J; Liu, L; Liu, Z; Peto, R; Sandercock, P; Wang, W; Wang, Y; Wang, Z; Xie, J; You, G; Zhang, F; et al. (LANCET, 1997)