Costello Anthony, Filippi Véronique, Kubba Tamara, Horton Richard
Centre for International Health and Development, Institute of Child Health, University College London, London WC1N 1EH, UK.
London School of Hygiene and Tropical Medicine, London, UK.
Lancet. 2007 Apr 14;369(9569):1240-1243. doi: 10.1016/S0140-6736(07)60574-1.