Financial support
Min Jee Park, So-Yeon Lee, Eun-Sang Rhee, Si Hyeon Lee, Mi-Jin Kang, Kun Baek Song, Sungsu Jung, Jisun Yoon, Dong In Suh, Youn Ho Shin, Kyung Won Kim, Kangmo Ahn, and Soo-Jong Hong have the following content of financial relationships.
This research was supported by the Research Program funded by the Korea Disease Control and Prevention Agency (2008-E33030-00, 2009-E33033-00, 2011-E33021-00, 2012-E33012-00, 2013-E51003-00, 2014-E51004-00, 2014-E51004-01, 2014-E51004-02, 2017-E67002-00, 2017-E67002-01, 2017-E67002-02); and Bio & Medical Technology Development Program of the National Research Foundation (NRF) funded by the Korean government (MSIT) (2017M3A9F3043834)
The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.