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Superior efficacy of St John's wort extract WS® 5570 compared to placebo in patients with major depression: a randomized, double-blind, placebo-controlled, multi-center trial [ISRCTN77277298]

Siegfried Kasper*, Ion-George Anghelescu, Armin Szegedi, Angelika Dienel and Meinhard Kieser

BMC Medicine 2006, 4:14  doi:10.1186/1741-7015-4-14

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