Funding for this research was provided by:
Hanmi Group (0620140890 (2013–2607))
Received: 22 April 2020
Accepted: 9 November 2020
First Online: 13 November 2020
Ethics approval and consent to participate
: This study protocol was approved by the Institutional Review Board of Seoul National University Hospital (IRB No. E-1703-020-836). Subjects were informed of the purpose of research and those participating in the NSPTA provided written informed consent, stating that these subjects understood that the information gathered through the NSPTA would be used for research purposes.Administrative permission to access the NHID was acquired through the National Health Insurance Sharing Service (NHIS-2018-2-201).
: Not applicable.
: The authors declare that they have no competing interests.