Kim, Mi-La
Hur, Yoon-Mi
Ryu, Hyejin
Lee, Min Jin
Seong, Seok Ju
Shin, Joong Sik http://orcid.org/0000-0001-6593-6561
Article History
Received: 26 October 2019
Accepted: 30 December 2019
First Online: 16 January 2020
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board (IRB) on the CHA Gangnam Medical Center (GCI-18-31). The IRB gave also an exemption regarding confidentiality of patient information. Data were anonymized and de-identified before analysis, and therefore, informed consent was not required.
: Not applicable.
: The authors declare that they have no competing interests.