Yashiro, Masatomo
Kotera, Hirohisa
Article History
Received: 12 October 2018
Accepted: 4 February 2019
First Online: 18 February 2019
Ethics approval
: This retrospective study was approved by the Institutional Ethical Review Board of Himeji Dokkyo University (No. 17–04).
: All data were anonymized in this study. Consent for publication was obtained thorough collaborating institutions.
: The authors declare that they have no competing interests.
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