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The radiopaque marker study (ROMS) is universally accepted and used to assess colonic transit time (CTT) in children with FC. Despite being widely used, there is a lack of standardization with various technical protocols, reproducibility of different populations, the purpose for using investigation, variance in the number of markers used, the amount of study days and calculations, the need to empty the colon before performing the test, and whether to perform on medication or off, or the use of specific diets. As part of the British Society of Paediatric Gastroenterology, Hepatology and Nutrition (BSPGHAN) motility working group (MWG), we decided to explore further into the evidence, in order to provide guidance regarding the use of ROMS in dealing with FC in the pediatric population.<\/jats:p>","DOI":"10.1111\/nmo.14776","type":"journal-article","created":{"date-parts":[[2024,3,8]],"date-time":"2024-03-08T05:09:45Z","timestamp":1709874585000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Radiopaque marker colonic transit study in the pediatric population BSPGHAN Motility Working Group consensus statement"],"prefix":"10.1111","volume":"36","author":[{"given":"M.","family":"Papadopoulos","sequence":"first","affiliation":[{"name":"Department of Paediatric Gastroenterology Evelina London Children's Hospital, St Thomas' Hospital  London 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