Received: 7 September 2018
Accepted: 6 December 2018
First Online: 17 December 2018
Ethics approval and consent to participate
: Approval for the study was received from the Institutional Review Board at Toho University Sakura Medical Center (approval number: S17012), and all patients gave their written consent to participate in this study. All activities were performed in accordance with the ethical standards set forth in the Declaration of Helsinki.
: All patients gave their written consent to publish to report individual patient data.
: The authors declare that they have no competing interests.
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