Funding for this research was provided by:
National Natural Science Foundation of China (81770287)
Received: 30 December 2019
Accepted: 2 June 2020
First Online: 11 June 2020
Ethics approval and consent to participate
: We have received ethical approval (2020-SR-055) from the institutional review boards (IRBs) at the First Affiliated Hospital of Nanjing Medical University. Since this study does not contain protected health information and all data were anonymously used, a waiver of the requirement for informed consent was approved by the IRBs. Individual patients consent was not obtained since all data used in this study were acquired retrospectively from the laboratory information system without any additional sampling or laboratory analysis.
: Not applicable.
: The authors declare that they have no competing interests.