Funding for this research was provided by:
Clinical Medicine Research Institute at Chosun University Hospital
Received: 28 January 2021
Accepted: 30 March 2021
First Online: 12 April 2021
: This study was approved by the Institutional Review Board of Chosun University Hospital (2014-04-004) and was registered at ExternalRef removed (registration number NCT02412150, 09/04/2015).Written informed consent for participation in the study was obtained from all the patients after careful explanation.This study was performed in accordance with the ethical standards of the Declaration of Helsinki (1964) and its subsequent amendments.
: Not applicable.
: The authors declare no conflict of interest.