Received: 18 July 2019
Accepted: 4 October 2019
First Online: 31 October 2019
Ethics approval and consent to participate
: All study procedures were in accordance with the ethical standards of the Helsinki Declaration. This study protocol was approved by the Institutional Review Board of Shitennoji University (IBU30Rin No.1). All patients received an explanation of the nature of the study, and they all provided written informed consent prior to enrollment.
: All respondents provided consent to publish before completing the questionnaires.
: The authors declare that they have no competing interests.