Funding for this research was provided by:
Dongkook Pharmaceutical, Seoul, South Korea.
Received: 30 April 2020
Accepted: 11 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: This prospective study protocol was reviewed and approved by the Institutional Review Board of Asan Medical Center (approval no. 2012–0831), and all patients gave written informed consent.
: Not applicable.
: The authors declare that they have nothing to disclose.