Song, In Gyu
Kwon, Seung Yeon
Chang, Yoon Jung
Kim, Min Sun
Jeong, Sung Hoon
Hahn, Seung Min
Han, Kyu Tae
Park, So-Jung
Choi, Jin Young
Article History
Received: 25 November 2020
Accepted: 7 May 2021
First Online: 24 May 2021
Declarations
:
: This study was granted ethical exemption by the institutional review board at Seoul National University Hospital and Severance Hospital since this was a retrospective review of medical records. Both institutions waived the requirement for informed consent since the survey involved “no more than minimal risk” to the respondents. The study was conducted in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors have no conflicts of interest to declare.