Funding for this research was provided by:
Asan Institute for Life Sciences, Asan Medical Center (2014-0576)
Text and Data Mining valid from 2019-05-01
Received: 10 December 2018
Accepted: 9 April 2019
First Online: 1 May 2019
Ethics approval and consent to participate
: The study protocol and informed consent form were reviewed and approved by the institutional review board of each center. The study was conducted in accordance with the Declaration of Helsinki and principles of Good Clinical Practice.
: Not applicable.
: The authors declare that they have no competing interests.
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