Funding for this research was provided by:
National Institute of Environmental Research in Korea (No. NIER-SP2013-181)
Text and Data Mining valid from 2018-04-20
Received: 17 July 2017
Accepted: 12 April 2018
First Online: 20 April 2018
Ethics approval and consent to participate
: This study protocol was approved by the Medical Center Institutional Review Board of Catholic University of Daegu (CR-13-053-RES-001-R) and was conducted in accordance with the ethical principles for medical research involving human subjects, as defined by the Helsinki Declaration. Study participants provided written informed consent.
: The authors declare that they have no competing interests.
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