Song, Kil-hun
Jang, Wol-song
Article History
Received: 17 September 2019
Accepted: 27 March 2020
First Online: 11 April 2020
Compliance with Ethical Standards
:
: Kil-hun Song and Wol-song Jang declare that they have no conflict of interest.
: All the procedures performed in our study were approved by the ethics committee of our institution and were in accordance with the 1964 Helsinki declaration and its later amendments.
: We obtained informed consents from all the patients who participated in our study.