%0 Journal Article %T Derivation and external validation of a nomogram predicting the occurrence of severe illness among hospitalized coronavirus disease 2019 patients: a 2020 Chinese multicenter retrospective study %A Feng, Yun %A Yang, Luyu %A Cheng, Zenghui %A Li, Jian %J Journal of Thoracic Disease %D 2023 %B 2023 %9 %! Derivation and external validation of a nomogram predicting the occurrence of severe illness among hospitalized coronavirus disease 2019 patients: a 2020 Chinese multicenter retrospective study %K %X %U https://jtd.amegroups.org/article/view/81337 %V 15 %N 12 %P 6589-6603 %@ 2077-6624