Affiliation: | a Centre for Mathematical Biology, Mathematical Institute, 24-29 St Giles’, Oxford OX1 3LB, UK b Centre for Mathematical Medicine, School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, UK c Unilever Corporate Research-Biosciences, Unilever Research and Development, Colworth Park, Sharnbrook MK44 1LQ, UK d Hugh Sinclair Unit of Human Nutrition, Department of Food Biosciences, University of Reading, P.O. Box 226, Whiteknights, Reading RG6 6AP, UK |