Department of Gynecology and Obstetrics, Kyushu University Hospital, Fukuoka, Japan

M.Y.: conceptualization, methodology, investigation, formal analysis, and writing—original draft. H.Y.: conceptualization, investigation, and supervision. K.O.: investigation and supervision. E.H.: data collection. K.H., S.M., K.K., H.Y., T.O., I.O., and K.A.: data collection ad investigation. K.K.: investigation, funding acquisition, and project administration.

The authors declare no conflicts of interest.

Correspondence: Masafumi Yasunaga, MD, PhD, Department of Gynecology and Obstetrics, Kyushu University Hospital, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan. E-mail: [email protected].

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