About the Authors

Sadie Boniface

sadie.boniface@kcl.ac.uk

Affiliation National Addiction Centre, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, United Kingdom

Shaun Scholes

Affiliation Research Department of Epidemiology & Public Health, University College London, London, United Kingdom

Nicola Shelton

Affiliation Research Department of Epidemiology & Public Health, University College London, London, United Kingdom

Jennie Connor

Affiliation Department of Preventive and Social Medicine, University of Otago, Dunedin, New Zealand

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: SB JC. Data curation: SB. Formal analysis: SB SS. Investigation: SB. Methodology: SB SS JC. Project administration: SB. Supervision: JC. Visualization: SB SS NS JC. Writing – original draft: SB. Writing – review & editing: SB SS NS JC.