Text and Data Mining valid from 2019-09-02
Received: 23 April 2019
Accepted: 29 July 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: Written informed consent was obtained from all subjects or their surrogates. The ethics committee of the Japanese Red Cross Society Saitama Hospital and Musashino University, ID n.17-c approved this study and the informed consent procedure. All phases of the study were carried out in accordance with the principles expressed in the WMA Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.