Funding for this research was provided by:
Tottori University (Jitsuyouka sizu shien shinsangyou sousyutsu shien jigyou)
Received: 13 April 2019
Accepted: 30 June 2019
First Online: 9 July 2019
Ethics approval and consent to participate
: All of the subjects provided written informed consent. The study was approved by the ethics committee of the Faculty of Medicine, Tottori University (No. 1701B076).
: Not applicable.
: The authors declare that they have no competing interests.