Funding for this research was provided by:
Korean Society of hypertension
Received: 27 September 2018
Accepted: 12 November 2018
First Online: 15 December 2018
Ethics approval and consent to participate
: This study was approved by the institutional review boards (IRB) of the Catholic University of Korea and the Seoul National University Hospital.
: Not applicable.
: The authors declare that they have no competing interests.
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