Text and Data Mining valid from 2018-07-05
Received: 20 January 2018
Accepted: 18 June 2018
First Online: 5 July 2018
Ethics approval and consent to participate
: This retrospective study received the approval by the Nagoya City Graduate School of Medical Sciences and Nagoya City University Hospital Institutional Review Board (No. 60-17-0071, approved on December 6, 2017) and was conducted in compliance with the guidelines of the Helsinki Declaration of 1975.
: Written informed consent for the publication of identifying images and information was given by the parent/legal guardian for those under 16 years old. Patients over 16 years old gave their own consent.
: The authors declare that they have no competing interests.
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