1. a Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
2. b Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
3. c Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
4. d Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China