1. Department of Clinical Medicine, School of Medicine, Walailak University, Nakhon Si Thammarat, Thailand
2. Family Medicine Clinic, Walailak University Hospital, Nakhon Si Thammarat, Thailand
3. Department of Basic Medical Sciences, Faculty of Medicine, Siam University, Bangkok, Thailand
4. Department of Physical Therapy, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
5. Department of Physical Therapy, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat, Thailand
6. Department of Clinical Pharmacology, Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand