1. Faculty of Pharmaceutical Sciences; Khon Kaen University; Khon Kaen 40002 Thailand
2. Regional Medical Sciences Center 7 Khon Kaen; Khon Kaen 40000 Thailand
3. Research Group for Pharmaceutical Activities of Natural Products using Pharmaceutical Biotechnology (PANPB); National Research University - Khon Kaen University; Khon Kaen 40002 Thailand
4. School of Pharmacy; Eastern Asia University; Pathum Thani 12110 Thailand
5. Faculty of Pharmaceutical Sciences; Chulalongkorn University; Bangkok 10330 Thailand
6. Graduate School of Pharmaceutical Sciences; Kyushu University; Fukuoka 812 -8582 Japan