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"A paper published in the Postgraduate Medical Journal, October 2007, has been reported widely. In the same issue there was a commentary by Edzard Ernst. They show the astonishingly poor evidence that herbal treatments work, despite the fact that they have been around for thousands of years." Article by Professor David Colquhoun, Dept. of Pharmacology, University College London (DC's Improbable Science, October 2007) [See the study linked to below]