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Reference: Nguyen, Hiep T et al. “2021 update on the urinary tract dilation (UTD) classification system: clarifications, review of the literature, and practical suggestions.” Pediatric radiology vol. 52,4 (2022): 740-751. doi:10.1007/s00247-021-05263-w
This update has been systematically evaluated and endorsed through the AGREE II methodology.