Kerry, S., Morgan, K., Limb, E., Cook, D., Furness, C., Carey, I., … Harris, T. (2018). Interpreting population reach of a large, successful physical activity trial delivered through primary care. BMC Public Health, 18(1), 170. https://doi.org/10.1186/s12889-018-5034-4 (Original work published 2018)