Received: 4 June 2020
Accepted: 26 November 2020
First Online: 7 December 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Institutional Review Board (IRB) (2020–021) of the University of Occupational and Environmental Health, Japan. Study participants provided written informed consent for participation and the use of their data in the study.
: The study participants provided written informed consents for participation and the use of their clinical data in this study. The written informed consents for publication of clinical details (the text and any pictures or video) were obtained from the patients’ relatives and treated confidentially.
: The authors declare no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.