Real-world effectiveness of early molnupiravir or nirmatrelvir-ritonavir in hospitalised patients with COVID-19 without supplemental oxygen requirement on admission during Hong Kong's omicron BA.2 wave: a retrospective cohort study - Wong, C KH; Au, I CH; Lau, K TK; Lau, E HY; Cowling, B J; Leung, G M (Lancet Infect Dis, 2022)