Funding for this research was provided by:
Korea National Institute of Health (2017R1E1A1A01078382)
Ministry of Education, Science and Technology (019R1F1A1046443)
Received: 3 October 2019
Accepted: 26 November 2019
First Online: 9 January 2020
Ethical approval and consent to participate
: The study was approved by the ethics committee of each center, and all patients provided informed consent for their inclusion.
: The authors declare no conflicts of interest.