1. Prince of Songkla University,Faculty of Medicine,Department of Biomedical Sciences and Biomedical Engineering,Hatyai,Songkhla,Thailand
2. Prince of Songkla University,Faculty of Medicine,Department of Orthopaedic,Hatyai,Songkhla,Thailand
3. Prince of Songkla University,Faculty of Engineering,Department of Electrical Engineering,Hatyai,Songkhla,Thailand