Kim, Hyojin http://orcid.org/0000-0001-7703-5170
An, Youngju
Joo, Choun-Ki http://orcid.org/0000-0003-0535-4118
Article History
Received: 10 June 2018
Accepted: 6 December 2018
First Online: 24 January 2019
Ethics approval and consent to participate
: This retrospective study was approved by the Ethics Committee of the Seoul St. Mary’s Hospital (Korea) (No. KC15RISI0241), and the tenets of the Declaration of Helsinki were followed.
: 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.