Funding for this research was provided by:
Grant of The First Affiliated Hospital of Xi’an Jiaotong University, Shaanxi Province, China (2016MS-01)
Received: 15 December 2017
Accepted: 3 January 2019
First Online: 11 January 2019
Ethics approval and consent to participate
: The study was deemed exempt from review by the Ethics Committee of the First Affiliated Hospital of Xi’an Jiaotong University as routine data for clinical purposes were used, and all patient information remained confidential in the study.
: LW, YX, XDT, JR, YY and WC have read and approved the final manuscript for publication in Antimicrobial Resistance & Infection Control.
: LW, YX, XDT, JR, YY and WC declare that they have no competing interest.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.