Ko, Sang-Hun
Kim, Myung-Seo https://orcid.org/0000-0003-2916-0131
Article History
Received: 30 October 2020
Accepted: 2 May 2021
First Online: 9 May 2021
Declarations
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: We confirm that the manuscript has been read and approved by all named authors and that there are no other persons who satisfied the criteria for authorship but are not listed. We further confirm that the order of authors listed in the manuscript has been approved by all of us. We understand that the Corresponding Author is the sole contact for the Editorial process. He is responsible for communicating with the other authors about progress, submissions of revisions and final approval of proofs. No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.
: This study was approved by our institutional review board (Ulsan University Hospital, UUH 2020-05-009). The study has been performed in accordance with the ethical standards in the 1964 Declaration of Helsinki and with relevant regulations of the US Health Insurance Portability and Accountability Act.
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