Authors: R T De Palma; K J Leveno; F G Cunningham; T Pope; S S Kappus; M L Roark; B J Nobles Journal: Obstet Gynecol Date: 1980-05 Impact factor: 7.661
Authors: D H Culver; T C Horan; R P Gaynes; W J Martone; W R Jarvis; T G Emori; S N Banerjee; J R Edwards; J S Tolson; T S Henderson Journal: Am J Med Date: 1991-09-16 Impact factor: 4.965