Funding for this research was provided by:
Ministry of Education, Science, Sports, and Culture of Japan (Grant-in-Aid for Scientific Research (A), Exploratory Research)
Received: 29 May 2019
Accepted: 15 October 2019
First Online: 2 December 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Japanese Society for Forensic Pathology.
: No informed consent was required.