Funding for this research was provided by:
Japan Agency for Medical Research and Development (18ek0109)
Received: 6 February 2019
Accepted: 12 June 2019
First Online: 20 June 2019
Ethics approval and consent to participate
: This study has been approved by the research ethics committee of Nagoya University (Permission number: 2017–0126). Written informed consent was obtained from all patients or their guardians.
: Not applicable.
: The authors declare that they have no competing interests.