Text and Data Mining valid from 2018-11-16
Received: 8 February 2018
Accepted: 31 October 2018
First Online: 16 November 2018
Ethics approval and consent to participate
: This study was approved by the Human Investigations Committee of Kyushu Dental University (14–35) and all subjects provided written informed consent prior to participation.
: Written informed consent was obtained from study participants for participation in the study and for publication of this research.
: The authors declare that have no competing interests.
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