Funding for this research was provided by:
the National Natural Science Foundation of China (81571871, 81770276)
Nn10 program (None)
Distinguished Young Scholars Fund of Harbin Medical University Cancer Hospital (None)
the Yuweihan Fund for Distinguished Young Scholars of Harbin Medical University (None)
Harbin Science and Technology Innovation Scholar Fund (2017RAXXJ087)
Heilongjiang Province Postdoctoral Research Fund (None)
Received: 23 February 2020
Accepted: 13 April 2020
First Online: 21 April 2020
Ethics approval and consent to participate
: The study protocol was approved by the ethical committee of the Second Affiliated Hospital of Harbin Medical University (Harbin, China) (KY2018-292). Written informed consent was obtained from all patients or their surrogates.
: Not applicable.
: The authors declare that they have no competing interests.