Funding for this research was provided by:
National Research Foundation of Korea (52013A015400210)
Text and Data Mining valid from 2019-08-07
Received: 18 October 2017
Accepted: 9 July 2019
First Online: 7 August 2019
Ethics approval and consent to participate
: Written/documented consent approved and reviewed by the Institutional Review Board of Seoul St. Mary’s Hospital, the Catholic University of Korea Study (No.: KC12OISI0532) Written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.