Authors: S R Cummings; D M Black; M C Nevitt; W S Browner; J A Cauley; H K Genant; S R Mascioli; J C Scott; D G Seeley; P Steiger Journal: JAMA Date: 1990-02-02 Impact factor: 56.272
Authors: B L Riggs; S F Hodgson; W M O'Fallon; E Y Chao; H W Wahner; J M Muhs; S L Cedel; L J Melton Journal: N Engl J Med Date: 1990-03-22 Impact factor: 91.245