- Correspondence to Dr Francisco Baldaque-Silva, Gastroenterology Department, Centro Hospitalar São João, Portugal, Alameda Prof. Hernâni Monteiro 34, Porto 4200–319, Portugal;
- Received May 14, 2013
- Revised May 29, 2013
- Accepted May 30, 2013
- First published June 27, 2013.
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