1. From the Adipokines and Metabolism Research Group, Centre for Clinical Pharmacology, Division of Medicine (K.K., N.O., N.M., and V.M.-A.), University College London, London, England; the Department of Cardiac and Vascular Sciences (K.K., J.-C.K., and M.J.), St George’s University of London, London; the Centre for Cardiovascular Biology, Division of Medicine (I.E.), University College London; and the Department of Clinical Chemistry (D.N.), Royal Free Hospital, London.