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An Initial Evaluation of the Safety, Efficacy and Purity of VigRX, an Herbal Combination Formula, for the Enhancement of Male Sexual Health.

Smitasiri Y, D’Souza P, Neal-Kababick J, Schauss AG. An Initial Evaluation of the Safety, Efficacy and Purity of VigRX, an Herbal Combination Formula, for the Enhancement of Male Sexual Health. The Open Natural Products Journal. 2010;3:10-19.

http://www.bentham.org/open/tonpj/openaccess2.htm