Estimating the effect of the 2005 change in BCG policy in England: a retrospective cohort study, 2000 to 2015 Abbott, Sam and Christensen, Hannah and Welton, Nicky J. and Brooks-Pollock, Ellen, Eurosurveillance, 24, 1900220 (2019), https://doi.org/10.2807/1560-7917.ES.2019.24.49.1900220