Enitan D. Carrol, Limangeni A. Mankhambo, Graham Jeffers, Deborah Parker, Malcolm Guiver, Paul Newland, Daniel L. Banda, The IPD Study Group, Elizabeth M. Molyneux, Robert S. Heyderman, Malcolm E. Molyneux, C. Anthony Hart
PLoS One. 2009; 4(8): e6621. Published online 2009 August 13. doi: 10.1371/journal.pone.0006621