Risk of intracerebral hemorrhage in patients with arterial versus cardiac origin of cerebral ischemia on aspirin or placebo: analysis of individual patient data from 9 trials. ανά Ariesen, M, Algra, A, Koudstaal, P, Rothwell, P, van Walraven, C

Outcomes of surveillance mammography after treatment of primary breast cancer: a population-based case series. ανά Paszat, L, Sutradhar, R, Grunfeld, E, Gainford, C, Benk, V, Bondy, S, Coyle, D, Holloway, C, Sawka, C, Shumak, R, Vallis, K, van Walraven, C

Effect of age on stroke prevention therapy in patients with atrial fibrillation: the atrial fibrillation investigators. ανά van Walraven, C, Hart, R, Connolly, S, Austin, P, Mant, J, Hobbs, F, Koudstaal, P, Petersen, P, Perez-Gomez, F, Knottnerus, J, Boode, B, Ezekowitz, MD, Singer, D