1. School of Clinical and Experimental Medicine and Birmingham and Black Country NIHR CLAHRC, University of Birmingham, Birmingham, UK
2. Specialist Weight Management Services, Heart of England NHS Foundation Trust, Birmingham, UK
3. School of Health and Population Sciences, University of Birmingham, UK
4. Academic Department of Sleep and Ventilation, Heart of England NHS Foundation Trust, Birmingham, UK
5. Aston University, Aston Triangle, Birmingham, UK