1. School of Physical Therapy, Faculty of Associated Medical Sciences, Khon Kaen University: Khon Kaen 40002, Thailand
2. Research Centre in Back, Neck, Other Joint Pain and Human Performance, Khon Kaen University, Thailand
3. Physical Therapy Unit, Department of Rehabilitation Medicine, Maharat Nakhon Ratchasima Hospital, Thailand
4. Graduate School of Human Health Sciences, Tokyo Metropolitan University, Japan