Received: 5 May 2019
Accepted: 28 October 2019
First Online: 9 November 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All protocols performed in this study were in accordance with ethical standards of the Ethical Review Board of Kochi Medical School and Matsuyama Rehabilitation Hospital.
: Written informed consent was obtained from all participants in this study.