- Correspondence to John S Hammond, Division of Gastrointestinal Surgery, Nottingham Digestive Diseases Centre NIHR Biomedical Research Unit, Nottingham University Hospitals, Nottingham, Nottinghamshire NG7 2UH, UK;
- Received July 30, 2012
- Revised September 4, 2012
- Accepted September 5, 2012
- First published October 20, 2012.
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