1. The University of Cambridge Metabolic Research Laboratories; Wellcome Trust-MRC Institute of Metabolic Science; Cambridge UK
2. The National Institute for Health Research Cambridge Biomedical Research Centre; Cambridge UK
3. The Pathology Partnership; Department of Clinical Biochemistry and Immunology; Addenbrooke's Hospital; Cambridge UK
4. Department of Endocrinology, Diabetes and Metabolism; Centro Hospitalar e Universitário de Coimbra; Coimbra Portugal
5. Department of Clinical Biochemistry; Western General Hospital; NHS Lothian; Edinburgh UK
6. Cambridge University Hospitals NHS Foundation Trust; Cambridge Biomedical Campus; Cambridge UK
7. Edinburgh Centre for Endocrinology and Diabetes; Royal Infirmary of Edinburgh; Edinburgh UK