1. Department of Endocrinology and Diabetes, Prince Charles Hospital, Merthyr Tydfil, United Kingdom.
2. School of Mathematics; School of Medicine; Cardiff University, Cardiff, United Kingdom.
3. Welsh Cancer Intelligence and Surveillance Unit (WCISU), Public Health Wales NHS Trust, Cardiff, United Kingdom.
4. Center for Endocrine and Diabetes Science, School of Medicine; Cardiff University, Cardiff, United Kingdom.