Text and Data Mining valid from 2018-03-15
Received: 24 November 2017
Accepted: 8 March 2018
First Online: 15 March 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of Nagoya University (14–504). All subjects gave informed consent in a document prior to participating in this study.
: The authors declare that they have no competing interests.
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