Natthida Weerapreeyakul*, Apiyada Nonpunya, Sahapat Barusrux, Thaweesak Thitimetharoch and Bungorn Sripanidkulchai
* Corresponding author: Natthida Weerapreeyakul natthida@kku.ac.th
Chinese Medicine 2012, 7:15 doi:10.1186/1749-8546-7-15