1. Human Muscle Metabolism Research Group, Loughborough University, Loughborough, LE11 3TU, U.K.
2. Oxford Lipid Metabolism Group, Radcliffe Infirmary, Oxford, OX2 6HE, U.K.
3. Institute of Human Nutrition, University of Southampton, Southampton SO16 7PX, U.K.
4. MRC Epidemiology and Medical Care Unit, Wolfson Institute of Preventive Medicine, Medical College of St Bartholomew's Hospital, London EC1M 6BQ, U.K.