1. University of Malaya, Department of Biomedical Engineering, Faculty of Engineering, 50603 Kuala Lumpur, MalaysiabUniversitas Abdurrab, Department of Informatics Engineering, Faculty of Engineering, Pekanbaru, 28291 Riau, Indonesia
2. University of Science Malaysia, School of Electrical and Electronic Engineering, Engineering Campus, Nibong Tebal, 14300 Penang, Malaysia
3. University of Malaya, Department of Biomedical Engineering, Faculty of Engineering, 50603 Kuala Lumpur, Malaysia