Hollis, C., Hall, C. L., Khan, K., Jones, R., Marston, L., Le Novere, M., …Murphy, T. (2023). Long-term clinical and cost-effectiveness of a therapist-supported online remote behavioural intervention for tics in children and adolescents: extended 12- and 18-month follow-up of a single-blind randomised controlled trial. Journal of Child Psychology and Psychiatry, 64(6), 941-951. https://doi.org/10.1111/jcpp.13756