Smoking and COVID-19 outcomes: an observational and Mendelian randomisation study using the UK Biobank cohort (Thorax, 2021)

(untitled) - Clift, AK; von Ende, A; Tan, PS; Sallis, HM; Lindson, N; Coupland, CAC; Munafò, MR; Aveyard, P; Hippisley-Cox, J; Hopewell, JC