Age and Comorbidity Burden of Patients Critically Ill with COVID-19 Affect Both Access to and Outcome of Ventilation Therapy in Intensive Care Units. - de Hesselle ML; Borgmann S; Rieg S; Vehreschild JJ; Rasch S; Koll CEM; Hower M; Stecher M; Ebert D; Hanses F; Schumann J; On Behalf Of The Leoss Study Group (Journal of clinical medicine, 2023)