Received: 13 May 2020
Accepted: 28 December 2020
First Online: 5 January 2021
Ethics approval and consent to participate
: The study design was approved by the institutional review board of Wakayama Medical University before initiation of the study (approval number: 2809). The patients and/or their family members were informed that the patient data would be submitted for publication, and their written consent was obtained.
: All patients consented to publish personal data in an anonymized form.This manuscript has not been published or presented elsewhere in part or in entirety and is not under consideration by another journal.
: The authors declare that they have no competing interest and no sources of financial supports.