Sonuga-Barke, E. J., Barton, J., Daley, D., Hutchings, J., Maishman, T., Raftery, J., Stanton, L., Laver-Bradbury, C., Chorozoglou, M., Coghill, D., Little, L., Ruddock, M., Radford, M., Yao, G.L., Lee, L., Gould, L., Shipway, L., Markomichali, P., McGuirk, J., Lowe, M., Perez, E., Lockwood, J., & Thompson, M. J. (2018). A comparison of the clinical effectiveness and cost of specialised individually delivered parent training for preschool attention-deficit/hyperactivity disorder and a generic, group-based programme: a multi-centre, randomised controlled trial of the New Forest Parenting Programme versus Incredible Years. European Child & Adolescent Psychiatry, 27(6), 797–809. Study 2.