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The Risk–Benefit Profile of Commonly Used Herbal Therapies: Ginkgo, St. John's Wort, Ginseng, Echinacea, Saw Palmetto, and Kava
Edzard Ernst, MD, PhD, FRCP(Edin)
Annals of Internal Medicine 2002;136:42-53. doi:10.7326/0003-4819-136-1-200201010-00010

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