Received: 17 September 2019
Accepted: 4 March 2020
First Online: 16 March 2020
Ethics approval and consent to participate
: The study protocol was approved by the Human Ethics Review Committees of Osaka International Cancer Institute and was registered in the University Hospital Medical Information Network (ExternalRef removed; registration number ID ExternalRef removed and ExternalRef removed). A signed consent form was obtained from each patient.
: Not applicable.
: The authors declare that they have no competing interests.