1. Birmingham and Black Country NIHR CLAHRC, University of Birmingham, Birmingham, UK
2. School of Health and Population Sciences, College of Medical and Dental Sciences, University of Birmingham, UK
3. Academic Unit of Sleep and Ventilation, Heart of England NHS Foundation Trust, Birmingham, UK
4. School of Life and Health Sciences Aston University, Birmingham UK
5. Department of Economic and Statistics Linnaeus University, Sweden
6. Institute of Public Health, Social and Preventive Medicine, Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany
7. School of Clinical and Experimental Medicine, University of Birmingham, Birmingham, UK
8. Weight Management Services, Heart of England NHS Foundation Trust, Birmingham, UK