The safety of herbal teas containing ginkgo leaves cannot be evaluated due to insufficient data
http://www.bfr.bund.de/cm/245/the_safety_of_herbal_teas_containing_ginkgo_leaves_cannot_be_evaluated_due_to_insufficient_data.pdf
ドイツ語で発表したものの英語要約
http://d.hatena.ne.jp/uneyama/20100513#p4