Funding for this research was provided by:
National Natural Science Foundation of China (81641116)
Received: 10 August 2019
Accepted: 17 February 2020
First Online: 24 February 2020
Ethics approval and consent to participate
: This study is in accordance with the Declaration of Helsinki and has been approved by the Ethics Committee of Zhongnan Hospital of Wuhan University. Due to the retrospective nature of the study, the informed consent requirement was waived.
: Not applicable.
: The authors declare that they have no competing interests.