From the Wynn Department of Metabolic Medicine, Imperial College School of Medicine at the National Heart and Lung Institute (F.L., I.F.G., A.J.P., C.W., S.A., J.C.S.); and the Department of Endocrinology, Imperial College School of Medicine, Hammersmith Campus (M.G., S.B.), London, UK. (At 1998-06)