| B Naser A randomized, double-blind, placebo-controlled, clinical dose-response trial of an extract of Baptisia, Echinacea and Thuja for the treatment of patients with common coldB Naser Schaper and Brtunmer GmbH and Co KG, Bahnhofstr 35, 38259 Salzgitter, Germany Phytomedicine 12:715-22. 2005 Suspected black cohosh hepatotoxicity: no evidence by meta-analysis of randomized controlled clinical trials for isopropanolic black cohosh extractBelal Naser Schaper and Brümmer GmbH and Co KG, Salzgitter, Germany Menopause 18:366-75. 2011
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