Article History
Received: 1 April 2021
Accepted: 13 July 2021
First Online: 21 July 2021
Declarations
:
: All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript.
: This is an observational study. The Ethics Committee of Tianjin Centers for Diseases Control and Prevention has confirmed that no ethical approval is required. And no approval of the Ethics Committee of Tianjin Centers for Diseases Control and Prevention was required to accomplish the goals of this study because animals, their data or biological material were all not involved in our study.
: Informed consent was obtained from all individual participants included in the study.
: The participant has consented to the submission of the case report to the journal.