Funding for this research was provided by:
National Research Foundation of Korea (2018R1C1B5040593)
Gyeongsang National Universty Hospital (GNUHBRIF-2017-0006)
Gyeongsang National University Hospital (GNUHBRIF-2019-0003)
Received: 23 March 2019
Accepted: 27 December 2019
First Online: 6 January 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Gyeongsang National University Hospital, and conformed to the tenets of the Declaration of Helsinki. Each patient’s parent or guardian signed a consent form.
: We confirm that all participants’ parents/legal guardians in our study provided written informed consent for the medical information to be published. A copy of the written consent is available for review by the editor of this journal.
: The authors declare that they have no competing interests.