1. Division of Medicine and Therapeutics, University of Dundee, Ninewells Hospital and Medical School, Dundee, UK
2. Department of Psychological Medicine, Gartnavel Royal Hospital, University of Glasgow, UK
3. Diabetes Centre, Macquaker Building, Victoria Infirmary, Glasgow, UK
4. Division of Medicine and Therapeutics, University of Dundee, Ninewells Hospital and Medical School, Dundee, UK,