Received: 8 July 2020
Accepted: 9 October 2020
First Online: 15 October 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Institutional Review Board (IRB) (2020–047) 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 consent for participation and the use of their clinical data in this study. The written informed consent for publication of their clinical details (the text and any pictures or video) was obtained from the patients or relatives of the patient; it will be treated confidentially.
: The authors declare that there are no potential conflicts of interest or competing interests with respect to the research, authorship, and/or publication of the work.