Funding for this research was provided by:
National Research Foundation of Korea (NRF-2016R1C1B2011211)
Ministry of Health and Welfare (HI16C0179)
Article History
Received: 26 June 2018
Revised: 3 September 2018
Accepted: 9 October 2018
First Online: 16 January 2019
Conflict of interest
: H.K.B. is supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (NRF-2016R1C1B2011211). M.K. is supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No.2017R1C1B2010867). J.Y. is supported by a grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (grant number: HI16C0179).