1. Institute of Chinese Medicine; The Chinese University of Hong Kong; Shatin, New Territories Hong Kong
2. State Key Laboratory of Phytochemistry and Plant Resources in West China; The Chinese University of Hong Kong; Shatin, New Territories Hong Kong
3. Department of Biological Sciences, Lehman College and The Graduate Center; City University of New York; Bronx New York USA
4. School of Medicine; Vanderbilt University; Nashville USA
5. School of Biomedical Sciences; The Chinese University of Hong Kong; Shatin, New Territories Hong Kong