Funding for this research was provided by:
the Korean Center for Disease Control and Prevention (2001-347-6111-221, 2002-347-6111-221, 2003-347-6111-221, 2004-E71001-00, 2005-E71001-00, 2006-E71005-00, 2006-E71006-00, 2007-E71001-00, 2007-E71003-00, 2008-E71001-00, 2008-E71005-00, 2009-E71002-00, 2009-E71007-00, 2010-E71001-00, 2010-E71004-00, 2011-E71004-00, 2011-E71008-00, 2012-E71005-00, 2012-E71008-00, 2013-E71005-00, 2013-E71007-00, 2014-E71003-00, 2014-E71005-00)
the NRF funded by the Korean government (NRF-2015M3A9B6027142)
Text and Data Mining valid from 2017-09-02
Received: 9 January 2017
Accepted: 18 August 2017
First Online: 2 September 2017
Ethics approval and consent to participate
: All participants provided written informed consent, and the study protocol was approved by the Human Subjects Review Committee at Korea University Ansan Hospital and Ajou University School of Medicine.
: Not applicable.
: The authors declare that they have no competing interests.
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