Consent for publication

This paper has been reviewed by all the co-authors, and permission for publication has been granted.

Availability of data and materials

The data in this manuscript were provided by the In-Hospital Emergency Committee in Japan under license. The datasets used and analyzed during this study are available from the corresponding author upon reasonable request with the permission of the In-Hospital Emergency Committee in Japan.

Conflict of interest

Tatsuya Tsuji, Yoshiki Sento and Kazuya Sobue declare that they have no competing interests.