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. 2021 May 27;9(6):E918–E924. doi: 10.1055/a-1396-4236

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The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

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Fig. 4 — In vivo experiment in the porcine model of gastrointestinal bleeding. a It was impossible to identify the bleeding point by using the water immersion technique. b The OPF-203 enables clear visualization of the bleeding point.