- Correspondence to Dr Hashem B El-Serag, Section of Gastroenterology and Hepatology, Houston VA Medical Center, and Baylor College of Medicine, 2002 Holcombe Boulevard (152), Houston, TX 77030, USA;
- Received December 4, 2012
- Revised June 12, 2013
- Accepted June 16, 2013
- First published July 13, 2013.
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