1. Teune MJ, Bakhuizen S, GyamfiBannerman C, Opmeer BC, van Kaam AH, van Wassenaer AG, et al. A systematic review of severe morbidity in infants born late preterm. Am J Obstet Gynecol 2011;205:374.e1–374.e9.
2. Mally PV, Hendricks-Muñoz KD, Bailey S. Incidence and etiology of late preterm admissions to the neonatal intensive care unit and itsassociated respiratory morbidities when compared to term infants. Am J Perinatol 2013;30:425–431.
3. Martin JA, Hamilton BE, Ventura SJ, Osterman MJ, Kirmeyer S, Mathews TJ, et al. Births: final data for 2009. Natl Vital Stat Rep 2011;60:1–70.
4. Davidoff MJ, Dias T, Damus K, Russell R, Bettegowda VR, Dolan S, et al. Changes in the gestational age distribution among U.S. singleton births: impact on rates of latepreterm birth, 1992 to 2002. Semin Perinatol 2006;30:8–15.
5. Engle WA, Kominiarek MA. Late preterm infants, early term infants, and timing of elective deliveries. Clin Perinatol 2008;35:325–341, vi.