Igarashi, Ayumi
Yamamoto-Mitani, Noriko
Morita, Kojiro
Matsui, Hiroki
Lai, Claudia K.Y.
Yasunaga, Hideo
Funding for this research was provided by:
Japan Agency for Medical Research and Development
Article History
Received: 22 October 2017
Accepted: 13 August 2018
First Online: 22 August 2018
Ethics approval and consent to participate
: Since the data used in this study is publicly available, we did not obtain written consent from the authorities in each hospital. The data used in this study did not meet the requirements of the Ethical Guidelines for Medical and Health Research Involving Human Subjects. As the data used in our study did not include individual-level patient data, we were not required to obtain the approval of our institution’s ethics committee.
: The authors declare that they have no competing interests.
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