Funding for this research was provided by:
National Research Foundation of Korea (2017R1D1A1B03035677)
Text and Data Mining valid from 2019-09-12
Received: 15 May 2019
Revised: 3 July 2019
Accepted: 5 July 2019
First Online: 12 September 2019
Compliance with ethical standards
: The authors declare that they have no competing interest.
: This study protocol was approved by the institutional review board of Changwon Gyeongsang National University Hospital (IRB No. GNUH IRB-2018-11-002-001) and informed consent was confirmed by IRB.