Funding for this research was provided by:
National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (No.2017R1A2B4009068)
The Institute of Integrated Technology (IIT) Research Project through a grant provided by GIST
Text and Data Mining valid from 2019-12-01
Received: 12 June 2019
Accepted: 12 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: The study protocol was approved by the Clinical Research Information Service (KCT0003995) and the Institutional Review Board of the Gwangju Institute of Science and Technology (20190327-HR-43-01-02). All the subjects signed written informed consents.
: Not Applicable.
: The authors declare that they have no competing interests.