Favipiravir, lopinavir-ritonavir, or combination therapy (FLARE): A randomised, double-blind, 2 × 2 factorial placebo-controlled trial of early antiviral therapy in COVID-19
Lowe et al., PLOS Medicine, doi:10.1371/journal.pmed.1004120 (preprint 2/15/2022)
https://c19early.org/lowe.html