Received: 22 March 2019
Accepted: 7 August 2019
First Online: 28 August 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.This study was approved by the Ethics Committee of Kansai Medical University (approval number: 1609).
: Not applicable.
: The authors declare that they have no competing interests.