Variables
Investigators and pediatric specialists from each institution reviewed
electronic health records to compile data. Variables were chosen to
describe demographic characteristics, comorbidities, signs and symptoms
upon admission, laboratory and imaging, and disease core variables
(severe clinical manifestation, treatment, and outcomes). These
variables were recorded in REDcap (electronic data capture system) and
variables regarding clinical presentation, treatment and outcomes and
radiological findings were recategorized for the analysis (Figure 1).
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