Koo, Kyo Chul
Lee, Jong Soo
Kim, Jong Won
Han, Kyung Suk
Lee, Kwang Suk
Kim, Do Kyung
Ha, Yoon Soo
Rha, Koon Ho
Hong, Sung Joon
Chung, Byung Ha
Funding for this research was provided by:
National Research Foundation of Korea (2017R1C1B5017513)
Article History
Received: 15 January 2018
Accepted: 17 April 2018
First Online: 26 April 2018
Ethics approval and consent to participate
: This study was approved by the Yonsei University Health System Institutional Review Board (2017–0186-001). Informed consent was waived from the Yonsei University Health System Institutional Review Board since patients’ information was collected during the routine clinical practice and patients were identified by anonymized investigator-generated code not linkable to their personal data. The same Institutional Review Board granted access to the institutional databases used in this study.
: The authors declare that they have no competing interests.
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