1. Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
2. Department of Biology & Chemistry, City University of Hong Kong, Kowloon Tong, Hong Kong, People's Republic of China
3. Department of Science & Environmental Studies, Faculty of Arts and Sciences, The Hong Kong Institute of Education, Tai Po, Hong Kong SAR, People's Republic of China
4. Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, People's Republic of China