An error occurred in this article by Laughon et al (doi:10.1542/peds.2007-2680). The list of participating centers, principal investigators, and research coordinators was inadvertently omitted from the manuscript:

Participating Investigators, Study Coordinators and Study Centers: Chile: Aldo Bancalari Molina (SC Lillian Cifuentes Navarro), Hospital Regional Guillermo Grant Benavente (Concepción, Chile); Alvaro José González Morandé, Hospital Clínico Universidad Católica de Chile (Santiago, Chile); Patricia Isabel Mena Nannig (SC M. Claudia Pinzon and Marcela Diaz), Hospital Dr. Sotero del Rio (Santiago, Chile); Maria Isabel Saldes Ebensperger (SC Paula Gajardo), Hospital Carlos Van Buren (Valparaiso, Chile); Jane E. Standen Herlitz (SC Alejandra Nunez), Hospital Dr. Gustavo Fricke (Viña del Mar, Chile); and Jorge F. Ubilla Macias (SC Marcela Perez Retamal), Hospital Clínico San Borja Arriaran (Santiago, Chile); Hungary: György Balla (SC Edit Polonkai), Debreceni Egyetem Orvos-és Egészségtudományi Centrum (Debrecen, Hungary); Tibor Ertl (SC Simone Funke), Szülészeti és Nogyógyászati Klinika (Pecs, Hungary); and Julia Hadjú...

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