Behaviour change interventions to reduce risky substance use and improve mental health in children in care: the SOLID three-arm feasibility RCT

Declared competing interests of authors: Eileen Kaner sat on the Public Health Research Research Funding Board (2010–16) and reports National Institute for Health Research (NIHR) Public Health Research grants during the conduct of this study. Denise Howel was a member of NIHR Health Services and Delivery Research Commissioning Board (2012–15) and is a member of NIHR Programme Grants for Applied Research Subpanel (2017–20). Elaine McColl was a member of the NIHR Journals Library Editorial Group; she was an editor for the NIHR Programme Grants for Applied Research programme (2013–16) and was a member of the NIHR Clinical Trials Unit Standing Advisory Committee until 2016. She reports grants from NIHR Public Health Research programme during the conduct of this study and other NIHR Journals Library-funded grants outside the submitted work.