Text and Data Mining valid from 2019-04-18
Received: 5 October 2018
Accepted: 26 March 2019
First Online: 18 April 2019
Ethics approval and consent to participate
: All subjects enrolled provided written informed consent for the analyses performed. The study was conducted according to the Declaration of Helsinki and approved by the ethics committee of Tokyo Women’s Medical University.
: The authors declare that they have no competing interests.
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