From the *Department of Orthopaedics and Traumatology, University of Hong Kong, Hong Kong, China; †Department of Physical and Rehabilitation Medicine, University of Oulu, Oulu, Finland; Departments of ‡Biochemistry; and §Psychiatry, University of Hong Kong, Hong Kong, China; and ¶Open University of Hong Kong, Hong Kong, China.
Acknowledgment date: March 17, 2008. Revision date: September 29, 2008. Acceptance date: October 28, 2008.
The manuscript submitted does not contain information about medical device(s)/drug(s).
Federal and institutional funds were received in support of this work. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.
Supported by the Research Grant Council of Hong Kong (HKU7230/01 M) and (HKU7509/03 M), from the University Grants Committee of Hong Kong (AoE/M-04/04), by grant MH44292 from the US National Institute of Mental Health, and from Academy of Finland (AR45982).
The first two authors contributed equally to the study.
Address correspondence and reprint requests to Kenneth M. C. Cheung, MBBS, MD, FRCS, FHKCOS, FHKAM, Department of Orthopedics and Traumatology, The University of Hong Kong Medical Centre, Queen Mary Hospital, Pokfulam, Hong Kong; E-mail: [email protected]
