Fell, M J, Russell, C, Medina, J, Gillgrass, T, Chummun, S, Cobb, A R M, Sandy, J R, Wren, Y E, Wills, A K & Lewis, S J 2021, ' The impact of changing cigarette smoking habits and smoke-free legislation on orofacial cleft incidence in the United Kingdom: Evidence from two time-series studies : Evidence from two time-series studies ', PLoS ONE, vol. 16, no. 11 November, e0259820 . https://doi.org/10.1371/journal.pone.0259820, https://doi.org/10.1371/journal.pone.0259820