1. Huang ZL, Huang XY, Zheng Q (2010) Medical Recapitulate 16:386–388
2. Ma HD, Shi GB (2009) Pharmaceut Care Res 9:374–376
3. Li P, Qi LW, Wen XD, Sheng LH (2007) Chin J Nat Med 5:1–9
4. Su W, Xu ZY (2007) Shanghai J Tradit Chin Med 41(9):87–88
5. Li YF, Liu L, Cheng YY (2007) Chromatographia 65:749–755