Shores MM, Arnold AM, Biggs ML, Longstreth WT, Smith NL, Kizer JR, Cappola AR, Hirsch CH, Marck BT, Matsumoto AM. Testosterone and dihydrotestosterone and incident ischaemic stroke in men in the Cardiovascular Health Study. Clin Endocrinol (Oxf). 2014  ;81(5):746-53.