Characteristics, Comorbidities and Laboratory Measures Associated With Disease Severity and Poor Prognosis in Young and Elderly Patients With COVID-19 Admitted to Medical Wards in Emilia-Romagna Region, Italy: A Multicentre Retrospective Study. Ital J Med 2023, 17 (1). https://doi.org/10.4081/itjm.2023.1608.