Affiliation: | (1) Perinatal Research Unit (PRU), Montevideo, Uruguay;(2) School of Public Health and Tropical Medicine, Tulane University, Louisiana, New Orleans, USA;(3) Institute of Clinical Effectiveness and Health Policy (IECS), Buenos Aires, Argentina;(4) RTI International, North Carolina, USA;(5) Center for Research for Mothers and Children, National Institute of Child Health & Human Development, USA |