1. Research Group for Pharmaceutical Activities of Natural Products using Pharmaceutical Biotechnology (PANPB), Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002 Thailand
2. Thai Traditional Medicine Program, Faculty of Natural Resources, Rajamangala University of Technology Isan Sakon Nakhon Campus, Sakon Nakhon 47160 Thailand
3. Faculty of Medicine, Mahasarakham University, Maha Sarakham 44000 Thailand