Funding for this research was provided by:
Ministry of Education, Culture, Sports, Science and Technology (JP18K07840)
Ministry of Health, Labour and Welfare (20316700 and 20317089)
Japan Agency for Medical Research and Development (JP20ek0109480)
Received: 24 November 2020
Accepted: 31 January 2021
First Online: 6 February 2021
Ethics approval and consent to participate
: Written informed consent to participate in this study was obtained from each of the patients or their parents. This study was conducted in accordance with the Declaration of Helsinki and approved by the ethics boards of Gifu University and Tokyo Medical and Dental University.
: Written informed consent for publication of this report was obtained from each of the patients or their parents.
: No authors have any conflicts of interest to declare.