Find" . The New York Times . http://www.nytimes.com/2008/11/19/health/research/18gingko.html . Retrieved 12 October 2009 .   ^ Koerner, Brendan I.. "Ginkgo Biloba? Forget About It." . Slate . http://www.slate.com/id/2165042/pagenum/all/ . Retrieved 12 October 2009 .   ^ http://nccam.nih.gov/health/ginkgo/D290_Herbs.pdf ^ Elsabagh, Sarah; Hartley, David E.; Ali, Osama; Williamson, Elizabeth M.; File, Sandra E.