Text and Data Mining valid from 2018-09-08
Received: 13 July 2018
Accepted: 4 September 2018
First Online: 8 September 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interests.
: This study was approved by the Nihon University Institutional Review Board. Written informed consent was obtained from the patient’s parent.
: Written informed consent was obtained from the patient’s parent for the publication of this manuscript.
: All data used and analyzed during this study are available from the corresponding author on reasonable request.