1. Faculty of Traditional Thai Medicine, Prince of Songkla University, Songkhla, Thailand
2. Department of Microbiology, Faculty of Science, Prince of Songkla University, Songkhla, Thailand
3. Excellent Research Laboratory on Natural Products, Faculty of Science and Natural Product Research Center of Excellence, Prince of Songkla University, Songkhla, Thailand
4. Faculty of Medical Technology, Prince of Songkla University, Songkhla, Thailand