这项研究是由美敦力公司和加拿大健康研究所出资，而研究的结果由《新英格兰医学周刊》发表到了网上。
Medtronic and the Canadian Institutes of Health Research paid for the study, and results were published online by the New England Journal of Medicine.
新英格兰医学周刊在2006年2月9日出版的一篇长达一年的研究报告显示，这种草药并不比诸如安慰剂等药片在治疗BPH上更有效果。
Published in the Feb. 9, 2006, New England Journal of Medicine, the yearlong study found that the plant extract was no more effective than inactive pills (placebos) in easing symptoms of BPH.
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