1. Division of Medical Sciences (N.M., J.D.C.-S., K.B., S.C.G., J.A.F.), The Medical School, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
2. Northern General Hospital (A.A.), Sheffield S5 7AU, United Kingdom
3. Royal Bournemouth Hospital (M.A.), Bournemouth BH7 7DW, United Kingdom
4. University of Cambridge (V.K.C.), Addenbrookes Hospital, Cambridge CB2 2QQ, United Kingdom
5. Centre for Endocrine and Diabetes Sciences (J.H.L.), Cardiff University, Cardiff CF10 3US, United Kingdom
6. Institute of Human Genetics (S.H.S.P.), School of Clinical Medical Sciences, Newcastle University, Newcastle NE1 3BZ, United Kingdom
7. Royal Devon and Exeter Hospital (B.V.), Exeter EX2 5DW, United Kingdom