Received: 13 December 2018
Accepted: 28 January 2019
First Online: 7 March 2019
Ethics approval and consent to participate
: Institutional Review Board approved the study protocol and waived the requirement for informed consent (approval number 16–2-23 at Fukuoka University Hospital).
: All authors provide their consent for the publication of this report.
: The authors declare that they have no competing interest.
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