Shin, Chang Ho
Lee, Doo Jae
Choi, In Ho
Cho, Tae-Joon
Yoo, Won Joon
Article History
Received: 21 July 2017
Accepted: 31 January 2018
First Online: 6 February 2018
Ethics approval and consent to participate
: This study was approved by Seoul National University College of Medicine/Seoul National University Hospital Institutional Review Board. Informed consent was waived because this study was a retrospective chart and radiograph review study and research activities did not involve any additional risk for patients.
: Not applicable.
: The authors declare that they have no competing interests.
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