1. Centre for Diabetes and Endocrinology, Aberdeen Royal Infirmary, Aberdeen, United Kingdom.
2. Centre for Endocrine and Diabetes Sciences, University Hospital of Wales, Cardiff, United Kingdom.
3. Edna Coates Diabetes Centre, Pinderfields Hospital, Wakefield, United Kingdom.
4. Department of Immunology, Aberdeen Royal Infirmary, Aberdeen, United Kingdom.
5. Department of Gastroenterology, Aberdeen Royal Infirmary, Aberdeen, United Kingdom.