Lee, Sejin
Lee, Harim
Song, Jeong Ho
Choi, Seohee
Cho, Minah
Son, Taeil
Kim, Hyoung-Il
Hyung, Woo Jin
Article History
Received: 23 September 2019
Accepted: 15 April 2020
First Online: 12 May 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Severance Hospital, Yonsei University Health System (4–2016-0771), which waived the need for informed consent for the use of patient data due to the retrospective nature of the study.
: Not applicable.
: Dr. Woo Jin Hyung has stock in Hutom, received research grants from Medtronic and GC Pharma, and is a consultant for Ethicon and Verb Surgical. Sejin Lee, Harim Lee, Jeong Ho Song, Seohee Choi, Minah Cho, Taeil Son, and Hyoung-Il Kim have no conflicts of interest or financial ties to disclose.