Received: 20 February 2020
Accepted: 12 February 2021
First Online: 24 February 2021
Ethics approval and consent to participate
: The present study was approved by the Institutional Ethical Committee of Baoji Central Hospital. Specialist physicians explained the informed consent to patients and/or their family members such that they were able to understand the informed consent independently, after obtaining patients and/or their family members verbal consent, patients and/or their family members signed on the printed version informed consent form. Verbal and written informed consent were obtained from all COVID-19 patients and/or their family members.
: Not applicable.
: The authors declare that they have no competing interests.