Received: 12 July 2019
Accepted: 13 September 2019
First Online: 24 October 2019
Ethics approval and consent to participate
: As stated in the “Methods” section, ethical approval of the study was provided by the Institutional Review Board of Kansai Medical University (date 15 July 2015, no. H160737). All participants were informed of the study and signed a written informed consent. The study was conducted according to the ethical principles stated in the Declaration of Helsinki.
: We received written informed consent from the patients.
: The authors declare that they have no competing interests.