1. Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
2. School of Pharmacy, Walailak University, Thaiburi, Thasala, Nakhon Si Thammarat 80160, Thailand
3. Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
4. Faculty of Pharmaceutical Sciences, Sanyo-Onoda City University, Sanyo-Onoda City 756-0884, Japan