1. Controversy: antenatal steroids;Wapner;Clin Perinatol,2011
2. Management of preterm labor. Practice bulletin No. 171;American College of Obstetricians and Gynecologists;Obstet Gynecol,2016
3. Prediction and prevention of preterm birth. Practice bulletin No. 130;American College of Obstetricians and Gynecologists;Obstet Gynecol,2012
4. Maduración pulmonar fetal. Prevención exitosa de complicaciones y muertes perinatales/Fetal lung maturation. Successful prevention of perinatal complications and deaths;Briceño-Pérez,2008
5. Effect of corticosteroids for fetal maturation on perinatal outcomes. February 28-March 2, 1994;National Institutes of Health Consensus Development Conference Statement;Am J Obstet Gynecol,1995