- Correspondence to Dr G K C Wong, Department of Surgery, 4/F Clinical Science Building, Prince of Wales Hospital, 1 Ngan Shing Street, Shatin, New Territories, Hong Kong SAR, China;
- Received January 8, 2012
- Revised July 2, 2012
- Accepted July 3, 2012
- First published July 31, 2012.
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