Received: 2 August 2019
Accepted: 2 January 2020
First Online: 17 January 2020
Ethics approval and consent to participate
: The protocol and consent forms were approved by the ethics committee at Kobe University Graduate School of Medicine and each of the participating institutions. All substantial protocol modifications will be notified as protocol amendments to these institutions. All patients or their legally authorized representatives will provide written informed consent before randomization by the investigators.
: Not applicable.
: The authors declare that they have no competing interests.