Traylor M, Farrall M, Holliday EG, Sudlow C, Hopewell JC, Cheng Y-C, Fornage M, Ikram AM, Malik R, Bevan S, et al. Genetic risk factors for ischaemic stroke and its subtypes (the METASTROKE collaboration): a meta-analysis of genome-wide association studies. Lancet Neurol. 2012  ;11(11):951-62.