1. Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR, China
2. Department of Biotechnology, Senshu University of Ishinomaki, 1 Shinmito,Minamisak, Ishinomaki, Miyagi 986-8580, Japan
3. Department of Zoology, University of British Columbia, Vancouver, BC,Canada