Authors: F E Shaw; D J Graham; H A Guess; J B Milstien; J M Johnson; G C Schatz; S C Hadler; J N Kuritsky; E E Hiner; D J Bregman Journal: Am J Epidemiol Date: 1988-02 Impact factor: 4.897
Authors: W Szmuness; C E Stevens; E J Harley; E A Zang; W R Oleszko; D C William; R Sadovsky; J M Morrison; A Kellner Journal: N Engl J Med Date: 1980-10-09 Impact factor: 91.245