1Patel, V, Flisher, AJ, Hetrick, S, McGorry, P. Mental health of young people: a global public-health challenge. Lancet 2007; 369: 1302–13.
2Kim-Cohen, J, Caspi, A, Moffitt, TE, Harrington, H, Milne, BJ, Poulton, R. Prior juvenile diagnoses in adults with mental disorder: developmental follow-back of a prospective-longitudinal cohort. Arch Gen Psychiatry 2003; 60: 709–17.
3Woodward, LJ, Fergusson, DM. Life course outcomes of young people with anxiety disorders in adolescence. J Am Acad Child Adolesc Psychiatry 2001; 40: 1086–93.
4Fergusson, DM, Woodward, LJ. Mental health, educational, and social role outcomes of adolescents with depression. Arch Gen Psychiatry 2002; 59: 225–31.
5James, A, James, G, Cowdrey, FA, Soler, A, Choke, A. Cognitive behavioural therapy for anxiety disorders in children and adolescents. Cochrane Database Syst Rev 2013; 3: CD004690.
6National Institute for Health and Care Excellence (NICE). Depression in Children and Young People: Identification and Management (Clinical Guideline 28). NICE, 2017 (www.nice.org.uk/guidance/cg28).
8Merikangas, KR, He, J, Burstein, M, Swendsen, J, Avenevoli, S, Case, B, et al. Service utilization for lifetime mental disorders in U.S. adolescents: results of the national comorbidity survey–adolescent supplement (NCS-A). J Am Acad Child Adolesc Psychiatry 2011; 50: 32–45.
9Ford, T, Hamilton, H, Meltzer, H, Goodman, R. Child mental health is everybody's business: the prevalence of contact with public sector services by type of disorder among British school children in a three-year period. Child Adolesc Ment Health 2007; 12: 13–20.
13Anthes, E. Pocket psychiatry: mobile mental-health apps have exploded onto the market, but few have been thoroughly tested. Nature 2016; 532: 20–4.
14Hollis, C, Falconer, C, Martin, J, Whittington, C, Stockton, S, Glazebrook, C, et al. Annual Research Review: digital health interventions for children and young people with mental health problems – a systematic and meta-review. J Child Psychol Psychiatry 2016; 58: 474–503.
15Bradford, S, Rickwood, D. Adolescent's preferred modes of delivery for mental health services. Child Adolesc Ment Health 2014; 19: 39–45.
16Wetterlin, FM, Mar, MY, Neilson, EK, Werker, GR, Krausz, M. eMental health experiences and expectations: a survey of youths’ web-based resource preferences in Canada. J Med Internet Res 2014; 16: e293.
17Zigmond, AS, Snaith, RP. The Hospital Anxiety and Depression Scale. Acta Psychiatr Scand 1983; 67: 361–70.
18White, D, Leach, C, Sims, R, Atkinson, M, Cottrell, D. Validation of the Hospital Anxiety and Depression Scale for use with adolescents. Br J Psychiatry 1999; 175: 452–4.
19Morgan, JF, Reid, F, Lacey, JH. The SCOFF questionnaire: assessment of a new screening tool for eating disorders. BMJ 1999; 319: 1467–8.
20Hansson, E, Daukantaité, D, Johnsson, P. SCOFF in a general Swedish adolescent population. J Eat Disord 2015; 3: 48.
22Proudfoot, J, Parker, G, Pavlovic, D, Manicavasagar, V, Adler, E, Whitton, A. Community attitudes to the appropriation of mobile phones for monitoring and managing depression, anxiety, and stress. J Med Internet Res 2010; 12: e64.
23Batterham, P, Calear, A. Preferences for internet-based mental health interventions in an adult online sample: findings from an online community survey. J Med Internet Res 2017; 4: e26.
24Johnson, KR, Fuchs, E, Horvath, KJ, Scal, P. Distressed and looking for help: internet intervention support for arthritis self-management. J Adolesc Health 2015; 56: 666–71.
25Lal, S, Daniel, W, Rivard, L. Perspectives of family members on using technology in youth mental health care: a qualitative study. J Med Internet Res 2017; 4: e21.
26Grist, R, Porter, J, Stallard, P. Mental health mobile apps for preadolescents and adolescents: a systematic review. J Med Internet Res 2017; 19: e176.