1. T. Thaweewannakij, PT, PhD, School of Physical Therapy, Faculty of Associated Medical Sciences, and Improvement of Physical Performance and Quality of Life (IPQ) Research Group, Khon Kaen University, Khon Kaen, Thailand.
2. S. Wilaichit, PT, MPH, Department of Physical Therapy, Damnoen Saduak Hospital, Ratchaburi, Thailand.
3. R. Chuchot, PT, MSc, Department of Physical Therapy, Maharaj Nakornsrithammarat Hospital, Nakornsrithammarat, Thailand.
4. Y. Yuenyong, PT, MSc, Department of Physical Therapy, Amnatcharoen Hospital, Amnatcharoen, Thailand.
5. J. Saengsuwan, NU, PhD, Faculty of Public Health and IPQ Research Group, Khon Kaen University.
6. W. Siritaratiwat, PT, PhD, School of Physical Therapy, Faculty of Associated Medical Sciences; IPQ Research Group; and Back, Neck and Other Joint Pain (BNOJP) Research Group, Khon Kaen University.
7. S. Amatachaya, PT, PhD, School of Physical Therapy, Faculty of Associated Medical Sciences, and IPQ Research Group, Khon Kaen University, Khon Kaen, 40002 Thailand.