Text and Data Mining valid from 2020-01-16
Received: 20 September 2019
Accepted: 13 January 2020
First Online: 16 January 2020
Ethics approval and consent to participate
: This study was approved by the research ethics committee of the Graduate School of Medicine, the University of Tokyo (No. 12037). Patients’ informed consent was obtained prior to study participation. Written informed consent was received from the nurses and ward managers involved in this study.
: Not applicable.
: The authors declare that they have no competing interests.