1. Bengbu Hospital of Traditional Chinese Medicine 4339 Huai-shang Road Bengbu Anhui 233080 P. R. China
2. Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Hong Kong China
3. Physiology and Biomedical Engineering Mayo Clinic Rochester MN 55905 USA
4. Lee Kong Chian School of Medicine Nanyang Technological University 11 Mandalay Road Singapore Singapore
5. Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) The Hong Kong University of Science and Technology Clear Water Bay Hong Kong China