1. Institute of Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand
2. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
3. Department of Mine and Materials Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, Thailand