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Influence of vitamin D status on hospital length of stay and prognosis in hospitalized patients with moderate to severe COVID-19: a multicenter prospective cohort study

Global HealthCovid-19 PandemicClinical EpidemiologyHospital LengthVitamin D StatusPublic HealthHospitalized PatientsMedicineHospital EpidemiologyEpidemiologyCovid-19Hospital Medicine