Ko, Sung Min
Lee, Janghee
Bae, Soong June
Baik, Su Jung
Ji, Junghwan
Kim, Dooreh
Ahn, Sung Gwe http://orcid.org/0000-0002-8778-9686
Jeong, Joon http://orcid.org/0000-0003-0397-0005
Article History
Received: 25 November 2020
Revised: 16 March 2021
Accepted: 31 March 2021
First Online: 19 April 2021
Ethics approval and consent to participate
: The study was conducted in accordance with the Good Clinical Practice guidelines and the Declaration of Helsinki. The protocol was approved by institutional review board (IRB) at of Gangnam Severance Hospital. The IRB granted a waiver of written documentation of informed consent from all participants because of the retrospective study design.
: The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
: The authors declare no competing interests.
: The authors report no sources of funding for this study.