Correction: Children’s Health in London and Luton (CHILL) cohort: a 12-month natural experimental study of the effects of the Ultra Low Emission Zone on children’s travel to school - Christina Xiao; James Scales; Jasmine Chavda; Rosamund E. Dove; Ivelina Tsocheva; Helen E. Wood; Harpal Kalsi; Luke Sartori; Grainne Colligan; Jessica Moon; Esther Lie; Kristian Petrovic; et al. (International Journal of Behavioral Nutrition and Physical Activity)