- Correspondence to Prof Flavio Caprioli, Gastroenterology and Endoscopy Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy;
- Received March 22, 2020
- Revised March 31, 2020
- Accepted March 31, 2020
- First published April 3, 2020.
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