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Authors
Sakata, Komei
Kaneko, Yuko https://orcid.org/0000-0003-2646-5765
Yasuoka, Hidekata
Takeuchi, Tsutomu
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Article History
Received: 26 February 2019
Revised: 31 May 2019
Accepted: 4 June 2019
First Online: 18 June 2019
Compliance with ethical standards
: This study was approved by the ethics committee of Keio University School of Medicine (approval number: 20130506). The requirement for informed consent from the patients was waived according to the regulation in Japan.
: None.
