Funding for this research was provided by:
Key Research and Development Program of Zhejiang (2015C03048)
Medical Health and Technology Plan of Zhejiang (2017KY571)
Received: 25 December 2019
Accepted: 14 April 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: This study was approved by the institutional review boards of the XCCDC. All clinical information has been already collected in another project and doesn’t involve any identifiable private information. Thus, the informed consent requirement was waived.
: Not Applicable.
: The authors declare that they have no competing interests.