Funding for this research was provided by:
National Natural Science Foundation of China (No.71473098)
Received: 27 February 2019
Accepted: 13 September 2019
First Online: 20 November 2019
Ethics approval and consent to participate
: The study was deemed exempt from review by the Ethics Committee of Tongji Medical College, Huazhong University of Science and Technology as routine data for clinical purpose were used and all the information of patients was kept confidential in the study. The raw data acquisition required administrative permission of the chief of nosocomial department in Tongji hospital.
: Not applicable.
: The authors declare that they have no competing interests.