1. Department of Medicine and Therapeutics, Chinese University of Hong Kong, Shatin, Hong Kong,
2. Department of Anatomical and Cellular Pathology, Chinese University of Hong Kong, Shatin, Hong Kong
3. Professional Programme of Medicine, Chinese University of Hong Kong, Shatin, Hong Kong
4. Department of Rehabilitation, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
5. Department of Medicine and Therapeutics, Chinese University of Hong Kong, Shatin, Hong Kong