Xiang-chun Shen*, Ling Tao, Wan-kui Li, Yan-yan Zhang, Hong Luo and Yu-yi Xia
* Corresponding author: Xiang-chun Shen shenxiangchun@126.com
BMC Complementary and Alternative Medicine 2012, 12:174 doi:10.1186/1472-6882-12-174