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The authors are grateful to all medical staff at Keio University Hospital for their excellent patient care. We would like to thank Editage ("https://www.editage.jp") for English editing.
Conflict of interest
Yoshifumi Kasuga, Kei Miyakoshi, and Mamoru Tanaka declare that they have no conflicts of interest.
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions.
Informed consent was obtained from the patient for being included in the study.
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Kasuga, Y., Miyakoshi, K. & Tanaka, M. Transvaginal ultrasound features of the residual cervix in pregnancy after radical trachelectomy. J Med Ultrasonics (2020) doi:10.1007/s10396-020-01005-x