Text and Data Mining valid from 2020-01-31
Received: 2 July 2019
Accepted: 23 January 2020
First Online: 31 January 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee at Tokyo Women’s Medical University (No. 5180). Patients provided informed written consent to be included in this study.
: Not applicable.
: The authors declare that they have no competing interests.