Received: 20 April 2020
Accepted: 21 May 2020
First Online: 26 May 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Kindai University Hospital (approval no.: 31-153) (Osaka, Japan). All patients provided written informed consent for participation in this retrospective study.
: Not applicable.
: The authors declare that they have no competing interests.