Funding for this research was provided by:
Japan Society for the Promotion of Science (15H01517, 15K15608, 26462529, 17K11280)
FUKUOKA OBGYN Researcher’s Charity Foundation Fund
Received: 20 September 2020
Accepted: 3 February 2021
First Online: 12 February 2021
Ethics approval and consent to participate
: Written informed consent was obtained from all patients. The study was approved by the Ethical Committee of Kyushu University.
: Not applicable.
: The authors have no conflict of interest.