Authors: José Villar, Guillermo Carroli, Daniel Wojdyla, Edgardo Ábalos, Daniel Giordano, Hassan Ba’aqeel, Ubaldo Farnot, Per Bergsjø, Leiv S. Bakketeig, Pisake Lumbiganon, Liana Campodónico, Yagob Al-Mazrou, Marshall D. Lindheimer, Michael S. Kramer - American Journal of Obstetrics and Gynecology 2006 cited by 466