- Dr Y K Wing, Professor, FRCPsych, FHKAM (Psych), Director of Sleep Assessment Unit, Department of Psychiatry, Shatin Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR;
- Received December 28, 2007
- Revised March 5, 2008
- Accepted March 8, 2008
- First published April 3, 2008.
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