Funding for this research was provided by:
National Research Foundation of Korea (2018R1C1B5040593)
Lee Jung Ja research grant of Gyeongsang National University Hospital (LJJ-GNUH-2018-001)
Text and Data Mining valid from 2019-04-13
Received: 4 January 2019
Accepted: 25 March 2019
First Online: 13 April 2019
Compliance with ethical standards
: The study protocol was approved by the Institutional Review Board of Gyeongsang National University Hospital (approval number: 2017-03-010). Written informed consent was obtained from all participants.
: The authors declare that they have no conflicts of interest.