Received: 17 August 2020
Accepted: 31 October 2020
First Online: 10 November 2020
Ethics approval and consent to participate
: This cohort study was approved by the Institutional Review Board of Ajou University Hospital (AJIRB-MED-EXP-17-253) and complied with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.