The quantitative evaluation of the impact of a new outdoor advertising restrictions policy in Bristol: a natural experiment evaluation. - Buckland, Genevieve; Toumpakari, Zoi; Jago, Russell; Harding, Sarah; Nobles, James; Horwood, Jeremy; Rejon, Carlos Sillero; Hollingworth, William; Cummins, Steve; Blake, Sarah; Nairn, Agnes; de Vocht, Frank (Lancet, 2024)