1 MRC Epidemiology Unit, Institute of Metabolic Science, University of Cambridge School of Clinical Medicine, Cambridge, U.K. [email protected].
2 Department of Public Health and Primary Care, University of Cambridge, Cambridge, U.K.Genetic Epidemiology Group, Wellcome Trust Sanger Institute, Hinxton, U.K.
3 MRC Epidemiology Unit, Institute of Metabolic Science, University of Cambridge School of Clinical Medicine, Cambridge, U.K.