Sodnom-Ish, Buyanbileg http://orcid.org/0000-0003-1137-3673
Eo, Mi Young http://orcid.org/0000-0001-7055-9924
Nguyen, Truc Thi Hoang http://orcid.org/0000-0002-8667-6698
Kim, Myung-Joo http://orcid.org/0000-0003-2020-5284
Kim, Soung Min http://orcid.org/0000-0002-6916-0489
Article History
Received: 8 February 2020
Accepted: 2 June 2020
First Online: 6 August 2020
Ethics approval and consent to participate
: This retrospective data analysis was approved by the Institutional Review Board of Seoul National University (S-D20200007).
: Consent for publication was obtained from all participants.
: Buyanbileg Sodnom-Ish, Mi Young Eo, Truc Thi Hoang Nguyen, Myung Joo Kim, and Soung Min Kim declare that they have no competing interests.