Cho, Jinhyun
Kim, Seok Jin
Park, Silvia
Yoo, Kwai Han
Ki, Chang-Seok
Ko, Younghyeh
Kim, Won Seog
Funding for this research was provided by:
Ministry of Health and Welfare (HI13C2096)
Article History
Received: 10 January 2018
Accepted: 19 March 2018
First Online: 8 April 2018
Compliance with ethical standards
: The study was reviewed and approved by the institutional review board at Samsung Medical Center. All procedures were performed in accordance with the principles of the Declaration of Helsinki.
: The authors declare that they have no conflicts of interest.