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Article History

Received: 12 July 2017

Accepted: 17 January 2018

First Online: 20 February 2018

Authors’ information

: NA is a PenCLAHRC Associate Professor in Health Services Research in the Plymouth University Peninsula Schools of Medicine and Dentistry. Prior to that he was a Senior Researcher at the Dartington Social Research Unit. His research focuses on prevention and early intervention in children’s services.GW is a Research Manager at Autistica. Prior to that she was a Postdoctoral Research Fellow at the Dartington Social Research Unit.TH is Director of the Dartington Service Design Lab. Previously he was a Senior Researcher and Head of Data and Analytics at the Dartington Social Research Unit.SH is a Post-doctoral Researcher at the Erasmus University Rotterdam. She was previously a Postdoctoral Research Fellow at the Dartington Social Research Unit.AR is a Research Assistant at the Department of Psychiatry, University of Oxford. Prior to that she was a Researcher at the Dartington Social Research Unit.VB is a Senior Research Fellow for NIHR CLAHRC South West Peninsula (PenCLAHRC) partnering with commissioners and providers in health and social care to build research capacity and answer clinically meaningful (patient-focused) questions. Her area of expertise is children’s mental health, parenting and domestic abuse.OU is an Associate Professor in Medical Statistics in NIHR CLAHRC South West Peninsula (PenCLAHRC), University of Exeter Medical School. His area of expertise is the analysis of data from cluster randomised trials.JM is a Research Fellow in NIHR CLAHRC South West Peninsula (PenCLAHRC), University of Exeter Medical School. He provides statistical support to a range of PenCLAHRC projects.TE is a Senior Medical Research Analyst Programmer for the Exeter Clinical Trials Unit and (NIHR) Clinical Research Facility at the University of Exeter Medical School.AK is a Senior Lecturer in the School of Education, University of Roehampton. She was previously a Research Fellow at the Dartington Social Research Unit and, before that, a Postdoctoral Researcher at the Institute of Psychiatry, King’s College London.SB is a Research Fellow in the Department of Health Sciences at the University of York. She has experience in facilitating service design, providing support to those implementing evidence-based programmes and mixed-methods evaluation. She previously worked at the Dartington Social Research Unit.TW is a Psychological Well-being Practitioner at the Torbay Depression and Anxiety Service. Prior to this he was a Researcher at the Dartington Social Research Unit.LT is a Senior Researcher at the RSA in the Public Services and Communities Team. Prior to this he was a PhD Researcher at the Dartington Social Research Unit.GB is a Postdoctoral Research Associate at the Peninsula Cerebra Research Unit, University of Exeter Medical School. She has experience of working on several RCTs and systematic reviews of interventions for children. Prior to this she was a Research Fellow at the Dartington Social Research Unit.

: Ethical approval was granted by the Warren House Group Research Ethics Committee on 20th October 2014 (ref. WHG2014–002). Any proposed changes to the protocol will be communicated to the Ethics Committee and approval will be sought before proceeding.

: Not applicable.

: The authors declare that they have no competing interests.

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