Funding for this research was provided by:
Guangdong Medical Research Foundation (NO. A2020001)
the Traditional Chinese Medicine Bureau of Guangdong Province (NO. 20201003)
Received: 13 March 2020
Accepted: 23 June 2020
First Online: 6 July 2020
Ethics approval and consent to participate
: In this study, we complied with the principles of the Declaration of Helsinki and obtained approval of this retrospective study from the Institutional Review Board of Guangdong Provincial People’s Hospital & Guangdong Academy of Medical Sciences. And the Committee waived the requirement to obtain informed consent.
: Not applicable.
: The authors declare that they have no competing interests.