Lee, Kil-yong
Park, Ji Won
Song, Inho
Lee, Ki-young
Cho, Sangsik
Kwon, Yoon-Hye
Kim, Min Jung
Ryoo, Seung-Bum
Jeong, Seung-Yong
Park, Kyu Joo
Article History
Received: 17 August 2018
Accepted: 20 November 2018
First Online: 4 December 2018
Ethics approval and consent to participate
: The study was performed in accordance with the declaration of Helsinki and was approved by the Seoul National University Hospital Institutional Review Board (IRB).
: 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.