Received: 18 September 2017
Accepted: 17 January 2018
First Online: 24 January 2018
Ethics approval and consent to participate
: All subjects gave their written informed consent after a complete explanation of this study before enrolling in the study. The study was performed in accordance with the guidelines of the Declaration of Helsinki and was approved by the research ethics committee of the Chubu University.
: Not applicable.
: The authors declare that they have no competing interests.
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