1. Cardiff School of Biosciences (N.M.T., J.S.D., T.W.), Cardiff University, Cardiff CF10 3US, United Kingdom
2. Department of Medical Nutrition (A.M.), Karolinska Institutet, Huddinge University Hospital, Novum S-14186, Sweden
3. Department of Neuroendocrinology (P.A.H.), Division of Neuroscience and Psychological Medicine, Imperial College London, Hammersmith Hospital, London W12 0NN, United Kingdom