Maves RC, Richard SA, Lindholm DA, Epsi N, Larson DT, Conlon C, Everson K, Lis S, Blair PW, Chi S, Ganesan A, Pollett S, Burgess TH, Agan BK, Colombo RE, Colombo CJ. Predictive Value of an Age-Based Modification of the National Early Warning System in Hospitalized Patients With COVID-19. Open Forum Infect Dis. 2021 Dec; 8(12):ofab421.