Funding for this research was provided by:
Emergency project for COVID-19 prevention and control of Central South University, China (160260005)
Received: 11 June 2020
Accepted: 1 September 2020
First Online: 7 September 2020
Ethics approval and consent to participate
: Because only the medical records were reviewed, this case series was exempted from signing the informed consent, which had been approved by the institutional ethics board of the Second Xiangya Hospital of Central South University (No. 2020001).
: Not applicable.
: The authors declare that they have no conflict of interest.