Funding for this research was provided by:
Ministry of Health, Labour and Welfare (nannti-ippann-004 and -018)
Japan Agency for Medical Research and Development (17ek0109104, 17ek0109121, and JP18ek0109360)
Received: 19 January 2021
Accepted: 5 May 2021
First Online: 1 September 2021
: Not applicable.
: Written informed consent for this case report has been obtained from the patient.
: Ken-ei Sada received speaker honoraria from Glaxo Smith Kline K.K. All other authors declare no conflicts of interest.