Authors: B Zuckerman; D A Frank; R Hingson; H Amaro; S M Levenson; H Kayne; S Parker; R Vinci; K Aboagye; L E Fried Journal: N Engl J Med Date: 1989-03-23 Impact factor: 91.245
Authors: S N MacGregor; L G Keith; I J Chasnoff; M A Rosner; G M Chisum; P Shaw; J P Minogue Journal: Am J Obstet Gynecol Date: 1987-09 Impact factor: 8.661