Editorial perspective: Transforming child and adolescent mental health services and systems (CAMHSS) around the globe - the importance of diversity, inclusion and equity in CAMHSS research.

Children and adolescents around the globe have mental health and neurodevelopmental needs. However, no country or region of the world has found good solutions to meet these needs, which are often long-term and complex. Most child and adolescent mental health research comes from high-income, mostly English-speaking, contexts even though 95% of the world's children and adolescents live in low- and middle-income countries (LMIC), where there is vast cultural, linguistic, and socio-economic diversity, with limited services and systems for child and adolescent mental health (CAMH). There is therefore both a 'knowledge gap' (more than 90% of all research represents less than 10% of the global population) and an 'identification and treatment gap' (fewer than 1 in 10 children in LMIC ever receive a diagnosis or any kind of treatment). The purpose of this editorial perspective was to consider the challenges of diversity, inclusion and equity in CAMH research around the globe, and to present some practical things we can all do to close these gaps and transform the global CAMH research agenda.