- Correspondence to Dr Yury V Popov, Division of Gastroenterology and Hepatology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02115, USA;
- Received June 21, 2016
- Revised December 7, 2016
- Accepted December 18, 2016
- First published January 10, 2017.
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