1 Nutrition and Behaviour Unit, School of Psychological Science, University of Bristol, Bristol, UK. Electronic address: annika.flynn@bristol.ac.uk.
2 Nutrition and Behaviour Unit, School of Psychological Science, University of Bristol, Bristol, UK.
3 National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD, USA.
4 Nutrition and Behaviour Unit, School of Psychological Science, University of Bristol, Bristol, UK; NIHR Bristol Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, UK.