Funding for this research was provided by:
Japan Society for the Promotion of Science (17k10164)
Received: 5 January 2019
Accepted: 27 August 2019
First Online: 4 October 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Hyogo college of Medicine (approval number 1147). We contacted the parents of the candidate patients by postal mail and asked them to forward a self-entry questionnaire and an informed consent form to the patients. All the participant returned their response with written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.