1. Faculty of Traditional Thai medicine, Prince of Songkla University, Hat Yai, Thailand
2. Natural Product Research Center of Excellence, Prince of Songkla University, Hat Yai, Thailand
3. Department of Thai Traditional Medicine, Faculty of Science and Technology, Rajamangala University of Technology Srivijaya (RMUTSV), Nakhon Si Thammarat, Thailand
4. Excellent Research Laboratory on Natural Products and Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, Thailand