Funding for this research was provided by:
the ImPACT Program of the Council for Science, Technology and Innovation
Grant-in-Aid for Scientific Research on Innovative Areas (ABiS) from the Ministry of Education
Culture, Sports, Science and Technology of Japan and by JSPS KAKENHI (18H02772)
Received: 9 January 2019
Accepted: 14 June 2019
First Online: 22 June 2019
Compliance with ethical standards
: Katsutoshi Murata is an employee of Siemens Healthcare K.K., Japan. All remaining authors declare no conflicts of interest associated with this manuscript.
: This study was approved by the local ethics review board of Juntendo University and subjects informed consent were obtained.