Abstract
：2019（COVID-19），。：WELL，2020482020529COVID-19，307518~80。，。：COVID-1920.6%；，（=0.61，：0.47~0.79，<0.01）、（=0.66，95%：0.50~0.88，<0.01）；，（=0.42，95%：0.21~0.82，<0.05）。：2019，1/5，。.
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