Funding for this research was provided by:
National Major Scientific and Technological Special Project for “Significant New Drugs Development (2017ZX09304029)
Beijing Hospitals Authority Youth Programme (QML 20181207)
Received: 26 August 2019
Accepted: 24 October 2019
First Online: 3 December 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This study was approved by the Ethics Committee of Beijing Children’s Hospital Affiliated to Capital Medical University. The committee exempted request for informed consent because this study only focused on bacteria and did not affect patients. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.