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Lovera J, Bagert B, Smoot K, et al. Ginkgo biloba for the improvement of cognitive performance in multiple sclerosis: a randomized, placebo-controlled trial. Mult Scler 2007 Apr;13(3):376-85.

 

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Zeng X, Liu M, Yang Y, et al. Ginkgo biloba for acute ischaemic stroke. Cochrane Database Syst Rev 2005 Oct 19;(4):CD003691.