Received: 3 August 2019
Accepted: 9 October 2019
First Online: 4 November 2019
Ethics approval and consent to participate
: This trial was approved by the ethics committee of Kagoshima University Hospital (#28-191) and prospectively registered on a publicly accessible database (UMIN Clinical Trials Registry ID: UMIN 000026957). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.