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Administration of mucolytic solution before upper endoscopy..:

Michal Stepan ; Premysl Falt ; Barbora Pipek...
https://biomed.papers.upol.cz/artkey/bio-202301-0010_administration-of-mucolytic-solution-before-upper-endoscopy-double-blind-monocentric-randomized-study.php.  , 2023