1. Department of Applied Electronics {and} Instrumentation, Government Engineering College, Kozhikode, Kerala, India
2. Department of Electronics and Computer Engineering, Ngee Ann Polytechnic, Singapore
3. Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
4. School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore
5. Biomedical Technologies Inc., Denver, CO, USA and Idaho State University (Aff.), ID, USA