Authors: W G Austen; J E Edwards; R L Frye; G G Gensini; V L Gott; L S Griffith; D C McGoon; M L Murphy; B B Roe Journal: Circulation Date: 1975-04 Impact factor: 29.690
Authors: L Goldman; D L Caldera; S R Nussbaum; F S Southwick; D Krogstad; B Murray; D S Burke; T A O'Malley; A H Goroll; C H Caplan; J Nolan; B Carabello; E E Slater Journal: N Engl J Med Date: 1977-10-20 Impact factor: 91.245