Funding for this research was provided by:
National Natural Science Foundation of China (81770504)
Text and Data Mining valid from 2019-01-22
Received: 18 September 2018
Accepted: 7 December 2018
First Online: 22 January 2019
Change Date: 14 February 2019
Change Type: Correction
Change Details: Following publication of the original article , the authors reported an error.
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Ethics Committee of Fuwai Hospital (No. 2016–842); the need for consent was waived for the retrospective study from January 2002 to January 2017 with de-identified data.
: Not applicable.
: The authors declare that they have no competing interests.
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