Funding for this research was provided by:
Fuwai Hospital, Chinese Academy of Medical Sciences
Text and Data Mining valid from 2019-09-02
Received: 6 November 2018
Accepted: 31 July 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Boards of Fuwai Hospital (Ethical Approval Number: 2012–428) and conformed to the Declaration of Helsinki. All patients have signed consent for participating this study.
: Not Applicable.
: The authors declare that they have no competing interests.