1. Medicinal Chemistry, Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, U.K.
2. Section of Investigative Medicine, Diabetes, Endocrinology & Metabolism, Imperial College London, 6th Floor, Commonwealth Building (6N2B), Hammersmith Hospital, Du Cane Road, London W12 0NN, U.K.
3. Medicinal Chemistry & Drug Discovery, Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, U.K.