Funding for this research was provided by:
Bio & Medical Technology Development Program of the National Research Foundation (NRF-2017M3A9E8033229, NRF-2017M3A9E8049714)
Bio & Medical Technology Development Program of the National Research Foundation (NRF-2019M3A9E8020538)
Received: 25 November 2020
Accepted: 11 February 2021
First Online: 24 February 2021
Ethics approval and consent to participate
: The study was approved by the ethics committee of our hospital (No. 2017-08-014). Written informed consent to participate in the study was obtained from each individual prior to recruitment.
: Not applicable.
: The authors declare that they have no competing interests.