About the Authors

Shunji Suzuki

Roles Data curation, Investigation, Methodology, Project administration, Resources, Software, Supervision, Writing – original draft

czg83542@mopera.ne.jp

Affiliations Department of Obstetrics and Gynecology, Japanese Red Cross Katsushika Maternity Hospital, Tokyo, JAPAN, Japan Association of Obstetricians and Gynecologists, Tokyo, JAPAN

Shin-ichi Hoshi

Roles Data curation, Writing – review & editing

Affiliation Japan Association of Obstetricians and Gynecologists, Tokyo, JAPAN

Akihiko Sekizawa

Roles Data curation, Writing – review & editing

Affiliation Japan Association of Obstetricians and Gynecologists, Tokyo, JAPAN

Yoko Sagara

Roles Methodology, Writing – review & editing

Affiliation Japan Association of Obstetricians and Gynecologists, Tokyo, JAPAN

Masanobu Tanaka

Roles Methodology, Writing – review & editing

Affiliation Japan Association of Obstetricians and Gynecologists, Tokyo, JAPAN

Katsuyuki Kinoshita

Roles Writing – review & editing

Affiliation Japan Association of Obstetricians and Gynecologists, Tokyo, JAPAN

Tadaichi Kitamura

Roles Methodology, Writing – review & editing

Affiliation Japanese Foundation for Sexual Health Medicine, Tokyo, JAPAN

Competing Interests

The authors have declared that no competing interests exist.