1. Division of Biological Chemistry & Drug Discovery College of Life Sciences University of Dundee Dow Street Dundee DD1 5EH UK
2. London School of Hygiene & Tropical Medicine Keppel Street London WC1E 7HT UK
3. Wellcome Centre for Molecular Parasitology and Division of Infection and Immunity Glasgow Biomedical Research Centre University of Glasgow 120 University Place Glasgow G12 8TA UK