Okeahialam NA, Thakar R, Sultan AH. Comparing diagnostic criteria between endoanal ultrasound and transperineal
ultrasound for diagnosing anal sphincter defects: secondary analysis of
prospective observational study. Ultrasound Obstet Gynecol 2022 May 31. doi: 10.1002/uog.24957.
PMID: 35638253