Authors: Marietta Vázquez; Philip S LaRussa; Anne A Gershon; Linda M Niccolai; Catherine E Muehlenbein; Sharon P Steinberg; Eugene D Shapiro Journal: JAMA Date: 2004-02-18 Impact factor: 56.272
Authors: E D Shapiro; A T Berg; R Austrian; D Schroeder; V Parcells; A Margolis; R K Adair; J D Clemens Journal: N Engl J Med Date: 1991-11-21 Impact factor: 91.245