1. Developmental Endocrinology Research Group (S.C.W., M.A.A., S.F.A.), University of Glasgow, Royal Hospital for Children, Glasgow G51 4TF, United Kingdom;
2. Division of Developmental Biology (R.D., C.F.), Roslin Institute, University of Edinburgh, Midlothian EH25 9RG, United Kingdom;
3. Hormone Research (G.A.W.), Murdoch Children's Research Institute, Melbourne, VIC 3052, Australia