Sung, Ki Hyuk
Choi, Young
Cho, Gyeong Hee
Chung, Chin Youb
Park, Moon Seok
Lee, Kyoung Min
Funding for this research was provided by:
Ministry of Science & ICT (2017M3A9D8064200)
Article History
Received: 23 September 2017
Revised: 22 December 2017
Accepted: 2 January 2018
First Online: 5 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.