1 Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Campus for Ageing and Vitality, Newcastle on Tyne NE4 5PL, UK.
2 Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PT, UK.
3 Women's Centre, John Radcliffe Hospital, Oxford OX3 9DU, UK. Electronic address: margaret.rees@st-hildas.ox.ac.uk.