Authors: R C Shaw; J P Connors; B R Hieb; P A Ludbrook; R Krone; R E Kleiger; T B Ferguson; C S Weldon Journal: Circulation Date: 1977-09 Impact factor: 29.690
Authors: S Scheidt; G Wilner; H Mueller; D Summers; M Lesch; G Wolff; J Krakauer; M Rubenfire; P Fleming; G Noon; N Oldham; T Killip; A Kantrowitz Journal: N Engl J Med Date: 1973-05-10 Impact factor: 91.245