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Paolo Deluca, Simon Coulton, Mohammed Fasihul Alam, Sadie Boniface, Kim Donoghue, Eilish Gilvarry, Eileen Kaner, Ellen Lynch, Ian Maconochie, Paul McArdle, Ruth McGovern, Dorothy Newbury-Birch, Robert Patton, Tracy Pellatt-Higgins, Ceri Phillips, Thomas Phillips, Rhys Pockett, Ian T Russell, John Strang & Colin Drummond.

Paolo Deluca ^1,*, Simon Coulton ², Mohammed Fasihul Alam ³, Sadie Boniface ¹, Kim Donoghue ¹, Eilish Gilvarry ^4,5, Eileen Kaner ⁵, Ellen Lynch ⁵, Ian Maconochie ⁶, Paul McArdle ⁴, Ruth McGovern ⁵, Dorothy Newbury-Birch ⁷, Robert Patton ⁸, Tracy Pellatt-Higgins ², Ceri Phillips ⁹, Thomas Phillips ^1,10, Rhys Pockett ⁹, Ian T Russell ¹¹, John Strang ^1,12, Colin Drummond ^1,12,†

¹ Addictions Department, National Addiction Centre, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
² Centre for Health Services Studies, University of Kent, Canterbury, UK
³ Department of Public Health, College of Health Sciences, Qatar University, , Qatar
⁴ Northumberland Tyne and Wear NHS Foundation Trust, Newcastle upon Tyne, UK
⁵ Institute of Health and Society, Newcastle University, Newcastle upon Tyne, UK
⁶ Paediatric Emergency Medicine, Imperial College London, London, UK
⁷ School of Health and Social Care, Teesside University, Middlesbrough, UK
⁸ School of Psychology, University of Surrey, Guildford, UK
⁹ Swansea Centre for Health Economics, College of Human and Health Sciences, Swansea University, Swansea, UK
¹⁰ Institute for Clinical and Applied Health Research, University of Hull, Hull, UK
¹¹ Medical School, Swansea University, Swansea, UK
¹² South London and Maudsley NHS Foundation Trust, London, UK
^* Corresponding author Email: paolo.deluca@kcl.ac.uk

^† Chief investigator and senior author