Funding for this research was provided by:
Ministry of Health and Welfare (HI14C1324, HI14C2357)
Yonsei University | Yonsei University College of Medicine (6-2015-0061)
Article History
Received: 27 July 2018
Accepted: 18 April 2019
First Online: 30 April 2019
Competing Interests
: The authors declare no competing interests.