Protocol and search strategy
The study was conducted following the Preferred Reporting Items for
Systematic review and Meta-Analysis[14]. Ethics committee approval
is not applicable for this study. The search strategy was developed by
experts in respiratory medicine. Search terms were as follows:
(“COVID-19” or “novel coronavirus-infected pneumonia” or
“NCIP”
or “SARS-CoV-2” or
“2019-nCoV”)
and (“Clinical characteristics” or “CT manifestations” or
“symptom” or “epidemiological characteristics” or “clinical
features”) (e-Table 1). Two reviewers (Mingjin Y. and Yan Z.)
independently searched PubMed, China
National Knowledge Infrastructure (CNKI),
EMBASE,
and
Cochrane
Library from May 05, 2020 to May 27, 2020. Articles in Chinese or
English were included.