King's College London

Funding Information: ADvaNCE is funded by Emerging Minds and the South West Doctoral Training Partnership. The authors would also like to thank the lived experience representatives as well as the clinicians, researchers and charity partners who supported the stakeholder work described in this letter. Dr Pile and Dr Loades are funded by the National Institute for Health Research (VP: Advanced Fellowship, NIHR301312; ML: NIHR Doctoral Research Fellowship, DRF-2016-09-021). This report is independent research. The views expressed in this publication are those of the authors(s) and not necessarily those of the NHS, NIHR or the Department of Health and Social Care.