Elsevier, Gastrointestinal Endoscopy, 3(91), p. 574-583, 2020
DOI: 10.1016/j.gie.2019.11.021
Elsevier, Gastrointestinal Endoscopy, 4(92), p. 980, 2020
DOI: 10.1016/j.gie.2020.05.008
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