Article History
Received: 15 March 2020
Accepted: 14 May 2020
First Online: 26 May 2020
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: Approval was obtained from the Research Ethics Committee of the University of Tsukuba.
: Anonymized data were made available from the fire department of Misato City according to the city’s Ordinance on Privacy Protection. Thus, informed consent from the study participants was not required.
: Not applicable.
: The data are not publicly available due to privacy concerns.
: Not applicable.