1. Center for Innovation in Medical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
2. Department of Biomedical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
3. Center for Printable Electronics, Universiti Malaya, Kuala Lumpur 50603, Malaysia
4. Department of Electrical and Electronics Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
5. Malaysian Research Institute on Ageing, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia