Authors: John Owen; Gary Hankins; Jay D Iams; Vincenzo Berghella; Jeanne S Sheffield; Annette Perez-Delboy; Robert S Egerman; Deborah A Wing; Mark Tomlinson; Richard Silver; Susan M Ramin; Edwin R Guzman; Michael Gordon; Helen Y How; Eric J Knudtson; Jeff M Szychowski; Suzanne Cliver; John C Hauth Journal: Am J Obstet Gynecol Date: 2009-10 Impact factor: 8.661