Endoscopic retroflexion in the duodenal bulb in upper gastrointestinal bleeding. Chelech F, Toledo PF, Berger Z. Gastrointest Endosc 2023 Jun 30:S0016-5107(23)02712.

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Chelech F, Toledo PF, Berger Z. Endoscopic retroflexion in the duodenal bulb in upper gastrointestinal bleeding. Gastrointest Endosc 2023 Jun 30:S0016-5107(23)02712.
PMID: 37394037