Funding for this research was provided by:
Biomedical Research Institute, Chonbuk National University Hospital (CUH2014-05019002)
Text and Data Mining valid from 2019-05-01
Received: 9 February 2019
Accepted: 22 April 2019
First Online: 1 May 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of the Biomedical Research Institute of Chonbuk National University Hospital and registered in Clinical Research Information Service in Korea (CRIS Reg No. KCT0001291). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.