Text and Data Mining valid from 2019-04-15
Received: 7 October 2018
Accepted: 24 March 2019
First Online: 15 April 2019
Ethics approval and consent to participate
: The retrospective and observational study was approved by the Guangdong Cardiovascular Institute, Guangdong General Hospital, and performed in accordance with the Declaration of Helsinki. All patients provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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