Jung, Na Yeon
Lim, Dong Hui
Hwang, Sung Soon
Hyun, Joo
Chung, Tae-Young
Article History
Received: 28 November 2017
Accepted: 24 October 2018
First Online: 9 November 2018
Ethics approval and consent to participate
: The study was approved by the Internal Review Board of Samsung Medical Center, and written informed consent was obtained from all of the participants.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.