1. University Malaysia Perlis,Faculty of Electrical Engineering and Technology,Department of Mechatronic Engineering,Perlis,Malaysia
2. University Malaysia Perlis,Faculty of Electrical Engineering Technology,Perlis,Malaysia
3. Universitas Muhammadiyah Yogyakarta,Faculty of Engineering,Department of Electrical Engineering,Yogyakarta,Indonesia
4. School of Medical Sciences, Universiti Sains Malaysia,Department of Orthopaedic,Penang,Malaysia