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Outcomes of Hospitalized COVID-19 Patients by Risk Factors:..:

Peter J. Mallow ; Kathy W. Belk ; Michael Topmiller.
http://jheor.scholasticahq.com/article/17331-outcomes-of-hospitalized-covid-19-patients-by-risk-factors-results-from-a-united-states-hospital-claims-database.pdf.  ,