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. 2023 Apr 18;72(10):1919–1926. doi: 10.1136/gutjnl-2022-327955

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© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Heterogeneity of the biliary microlithiasis definitions used. Graphical representation of the definition heterogeneities used in the included studies for the term biliary microlithiasis as well as the stated cut-off values (if mentioned). Original studies (red, green and blue dots) as well as review studies (purple dots) are listed. Each dot symbolises a threshold value (A) or a definition point mentioned in the paper (B); see definition legend. **Gallstones not discriminated from microlithiasis. ***No difference between sludge and microlithiasis patients made. ****Video fragements used. RCT, randomised controlled trial.