Early combination therapy of COVID-19 in high-risk patients. - Orth HM; Flasshove C; Berger M; Hattenhauer T; Biederbick KD; Mispelbaum R; Klein U; Stemler J; Fisahn M; Doleschall AD; Baermann BN; Koenigshausen E; et al. (Infection, 2024)