1. Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, Thailand;
2. Department of Engineering, King Mongkut's Institute of Technology Ladkrabang, Prince of Chumphon Campus, Chumphon, Thailand;
3. Department of Surgery, Neurosurgical Unit, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand;
4. S&J International Enterprises Public Company Limited, Tungwatdon, Sathon, Bangkok, Thailand