Pérez-Belmonte, Luis MSanz-Cánovas, JaimeSalinas, AlejandroFornie, Iñigo SagastagoitiaMéndez-Bailón, ManuelGómez-Huelgas, RicardoSEMI-COVID-19 Network2025-01-072025-01-072021-10-12https://hdl.handle.net/10668/24526enAdrenal Cortex HormonesAgedCOVID-19Critical CareFemaleHeart FailureHospital MortalityHumansHydroxychloroquineLength of StayMaleMiddle AgedRetrospective StudiesSeverity of Illness IndexCOVID-19 Drug Treatmentresearch article34637077open access10.1007/s11739-021-02843-41970-9366PMC8505476https://link.springer.com/content/pdf/10.1007/s11739-021-02843-4.pdfhttps://pmc.ncbi.nlm.nih.gov/articles/PMC8505476/pdf