1. University of Calgary, Calgary, Canada
2. The Hong Kong Polytechnic University, Hung Hom, Hong Kong
3. Foothills Medical Centre, Calgary, Canada
4. Department of Clinical Psychology, Prince of Wales Hospital, Sha Tin, Hong Kong
5. Chinese University Medical Centre, Ma Liu Shui, Hong Kong
6. Department of Surgery, Prince of Wales Hospital, Sha Tin, Hong Kong;
7. Department of Medicine and Therapeutics, Prince of Wales Hospital, Sha Tin, Hong Kong
8. Department of Medicine, Alice Ho Miu Ling Nethersole Hospital, Tai Po, Hong Kong
9. Department of Clinical Neurosciences, University of Calgary, Alberta, Canada
10. Department of Clinical Neurosciences, University of Calgary, Calgary, Canada