Funding for this research was provided by:
National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2012027176)
Text and Data Mining valid from 2018-11-12
Received: 28 May 2018
Revised: 9 August 2018
Accepted: 11 September 2018
First Online: 12 November 2018
Compliance with ethical standards
: The scientific guarantor of this publication is Dr. Chang Hyuk-Jae.
: The authors declare that they have no conflict of interest.
: Dr. Sung Ji-Min kindly provided statistical advice for this manuscript.No complex statistical methods were necessary for this paper.
: Written informed consent was obtained from all subjects (patients) in this study.
: Institutional Review Board approval was obtained.
: • Prospective• Experimental• Performed at one institution