Authors: R T Hall; W Barnes; L Krishnan; D J Harris; P G Rhodes; J Fayez; G L Miller Journal: Am J Obstet Gynecol Date: 1976-03-15 Impact factor: 8.661
Authors: S P Pyati; R S Pildes; N M Jacobs; R S Ramamurthy; T F Yeh; D S Raval; L D Lilien; P Amma; W I Metzger Journal: N Engl J Med Date: 1983-06-09 Impact factor: 91.245