1. Photonics Research Centre, University of Malaya, Kuala Lumpur, Malaysia
2. Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
3. Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Science, UCSI University, Kuala Lumpur, Malaysia
4. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai, China