Funding for this research was provided by:
Seoul National University College of Medicine Research Fund (2018)
Text and Data Mining valid from 2019-01-05
Received: 21 May 2018
Accepted: 12 December 2018
First Online: 5 January 2019
Ethics approval and consent to participate
: This study was approved by Institutional Review Board of the Seoul National University Hospital, Seoul, Korea (1703–004-834). Patients were not required to give informed consent to the study because the analysis used anonymous clinical data that were obtained after each patient agreed to treatment by written consent.
: Not applicable.
: The authors declare that they have no competing interests.
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