The concentrations of remdesivir and GS-441524 were measured using LC-MS/MS. Renal and liver function were assessed. Renal fibrosis was evaluated by Masson’s trichrome staining and Western blotting.

9 Lung sections were prepared as described previously.12 Sections were stained with H&E and Masson's trichrome staining according to standard protocols. All slides were analysed by two blinded ...

7 Department of Neurology, Queen Elizabeth Hospital, Edgbaston, Birmingham, UK 8 Department of Neurology, King's College Hospital and King's College School of Medicine, London, UK Correspondence to Dr ...