Funding for this research was provided by:
Peking University Third Hospital (Y62419-06)
Text and Data Mining valid from 2019-11-08
Received: 11 June 2019
Accepted: 14 October 2019
First Online: 8 November 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Ethical Committee of Peking University Third Hospital and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
: Not applicable
: The authors declare that they have no competing interests.