1. Department of Basic Medical Science, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand
2. Department of Microbiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
3. Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
4. Department of Pharmaceutical Chemistry, Rangsit University, Pathum Thani 12000, Thailand