1. Mahady GB: Global harmonization of herbal health claims. J Nutr 2001, 131(3 Suppl):1120S–1123S.
2. Barnes PM, Powell-Griner E, McFann K, Nahin RL: Complementary and alternative medicine use among adults: United States, 2002. Adv Data 2004, 343:1–19.
3. Ameh SJ, Obodozi OO, Inyang US, et al.: Current phytotherapy—a perspective on the science and regulation of herbal medicine. J Med Plants Res 2010, 4:72–81.
4. Nahin RL, Barnes PM, Stussman BJ, Bloom B: Costs of complementary and alternative medicine (CAM) and frequency of visits to CAM practitioners: United States, 2007. Natl Health Stat Report 2009, 18:1–14.
5. Lowe FC: Phytotherapy in the management of benign prostatic hyperplasia. Urology 2001, 58(6 Suppl 1):71–76; discussion 76–77.