1. 1Diabetes Research Centre, College of Life Sciences, University of Leicester, Leicester General Hospital, Leicester, U.K.
2. 2Leicester Diabetes Centre, University Hospitals of Leicester NHS Trust, Leicester, U.K.
3. 3National Institute for Health Research Leicester Biomedical Research Centre, Leicester, U.K.
4. 4The Hanning Sleep Laboratory, University Hospitals of Leicester NHS Trust, Leicester, U.K.
5. 5National Institute for Health Research Applied Research Collaboration East Midlands, Leicester, U.K.
6. 6School of Psychology, Deakin University, Geelong, Victoria, Australia
7. 7The Australian Centre for Behavioural Research in Diabetes, Diabetes Victoria, Melbourne, Victoria, Australia