1. B. Chinsongkram, MS, Division of Physical Therapy, Faculty of Health Science, Srinakharinwirot University, Nakhon Nayok, Thailand, and Faculty of Physical Therapy, Rangsit University, Pathum Thani, Thailand.
2. N. Chaikeeree, MS, Division of Physical Therapy, Faculty of Health Science, Srinakharinwirot University, and Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand.
3. V. Saengsirisuwan, PhD, Department of Physiology, Faculty of Science, Mahidol University.
4. N. Viriyatharakij, PhD, Division of Physical Therapy, Faculty of Health Science, Srinakharinwirot University.
5. F.B. Horak, PhD, Balance Disorders Laboratory, Neurological Sciences Institute, Oregon Health and Science University, Beaverton, Oregon.
6. R. Boonsinsukh, PhD, Division of Physical Therapy, Faculty of Health Science, Srinakharinwirot University, 63 moo 7 Rungsit-Nakhonnayok, Ongkharuk, Nakhon Nayok, 26120.