Wings T. Y. Loo1, L. J. Jin1, Mary N. B. Cheung2, Yi-ding Dou2* and J. P. Chen3
1Faculty of Dentistry, the University of Hong Kong, Hong Kong.
2Jinhua Dentistry, Chengdu, Sichuan, China.
3School of Chinese Medicine, University of Hong Kong, Hong Kong.
Email: [email protected]