1. Department of Applied Physics; The Hong Kong Polytechnic University; Hung Hom Kowloon Hong Kong
2. Department of Health Technology and Informatics; Faculty of Health and Social Sciences; The Hong Kong Polytechnic University; Hung Hom Kowloon Hong Kong
3. Institute of Textiles Clothing; The Hong Kong Polytechnic University; Hung Hom Kowloon Hong Kong