Smoking and COVID-19 outcomes: an observational and Mendelian randomisation study using the UK Biobank cohort.
Ashley Kieran CliftAdam von EndePui San TanHannah M SallisNicola LindsonCarol A C CouplandMarcus R MunafòPaul N AveyardJulia Hippisley-CoxJemma C HopewellPublished in: Thorax (2021)
Congruent results from two analytical approaches support a causal effect of smoking on risk of severe COVID-19.