Funding for this research was provided by:
Korea National Institue of Health (4800-4845-302(2017-NI63001-00))
Article History
Received: 27 March 2019
Accepted: 2 August 2019
First Online: 8 August 2019
Ethics approval and consent to participate
: This study protocol was approved by the Ethics Committee/Institutional Review Board (IRB No. 1102–072-352) of each participating hospital: Seoul National University Hospital; Seoul National University Bundang Hospital; Chungbuk National University hospital; Chonnam National University Hospital; Samsung Medical Center; Asan Medical Center; Kyungpook National University hospital; Catholic University St. Mary’s Hospital; Yonsei University Severance Hospital; Wonju Christian Hospital. Written informed consent was obtained from each patient. If patients were unable to provide consent due to disease severity or other reasons, informed consent was obtained from relatives or a legal guardian.
: Not applicable.
: The authors declare that they have no competing interests..