Isogai, Toshiaki http://orcid.org/0000-0002-2172-6447
Matsui, Hiroki
Tanaka, Hiroyuki
Kohyama, Akira
Fushimi, Kiyohide
Yasunaga, Hideo
Funding for this research was provided by:
Ministry of Health, Labour and Welfare (H29-Policy-Designated-009, H29-Policy-Designated-009, H29-ICT-General-004)
Ministry of Education, Culture, Sports, Science and Technology (17H04141)
Japan Agency for Medical Research and Development
Article History
Received: 28 August 2017
Accepted: 9 February 2018
First Online: 17 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by The Institutional Review Board at The University of Tokyo.
: The requirement for informed consent was waived because all data in the DPC database are anonymized.