Authors: Fernando Althabe; José M Belizán; José Villar; Sophie Alexander; Eduardo Bergel; Silvina Ramos; Mariana Romero; Allan Donner; Gunilla Lindmark; Ana Langer; Ubaldo Farnot; José G Cecatti; Guillermo Carroli; Edgar Kestler Journal: Lancet Date: 2004-06-12 Impact factor: 79.321