These criteria are now known as the Rome Criteria.
The fourth revision came out in 2016.
2016 May;150(6):1456-1468. doi:10.1053/j.gastro.2016.02.015
Fikree A, Byrne P.Management of functional gastrointestinal disorders.Clin Med.
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2021 Jan;21(1):44-52. doi:10.7861/clinmed.2020-0980