Data-Driven Comorbidity Phenotypes and In-Hospital Outcomes Among Patients With Nonvariceal Upper Gastrointestinal Bleeding: Formative Retrospective Cohort Study

Data-Driven Comorbidity Phenotypes and In-Hospital Outcomes Among Patients With Nonvariceal Upper Gastrointestinal Bleeding: Formative Retrospective Cohort Study

Authors of this article:

Fangning Wang^{1, 2} ;   Yuhang Zhou² ;   Qin Zhang^{2, 3} ;   Yuan Liu^{2, 3} ;   Yanli Zhang^{1, 2} ;   Shiyu Du^{1, 2}