Authors: R J Chetkowski; D R Meldrum; K A Steingold; D Randle; J K Lu; P Eggena; J M Hershman; N K Alkjaersig; A P Fletcher; H L Judd Journal: N Engl J Med Date: 1986-06-19 Impact factor: 91.245
Authors: D Crook; M P Cust; K F Gangar; M Worthington; T C Hillard; J C Stevenson; M I Whitehead; V Wynn Journal: Am J Obstet Gynecol Date: 1992-03 Impact factor: 8.661
Authors: M J Stampfer; G A Colditz; W C Willett; J E Manson; B Rosner; F E Speizer; C H Hennekens Journal: N Engl J Med Date: 1991-09-12 Impact factor: 91.245