Received: 14 September 2020
Revised: 5 October 2020
Accepted: 8 October 2020
First Online: 20 October 2020
Ethics approval and consent to participate
: The study was approved by our institutional ethics committee(#1603: Graduate School of Medicine, Chiba University, Chiba, Japan)and registered in the University Hospital Medical Information Network Clinical Trial Registry (UMIN000011580). Written informed consent was obtained from all patients prior to study enrollment after the aim and potential risks of the study were fully explained.
: Not applicable
: The authors declare that they have no competing interests.