Received: 18 April 2020
Accepted: 25 January 2021
First Online: 18 February 2021
Ethics approval and consent to participate
: The study protocol was approved by the Clinical Research Ethics Committee of Jingmen No.1 People’s Hospital. Due to the infectiousness of the disease and the regulations of nosocomial infection prevention and control, we failed to directly contact with the COVID-19 patients. However, with clinicians’ assistance, verbal informed consent was obtained from patients or their family members, and this procedure was approved by the ethics committee. All patients’ data were anonymised before use.
: Not applicable.
: The authors declare that they have no competing interests.