Authors: M S Eisenberg; M K Copass; A P Hallstrom; B Blake; L Bergner; F A Short; L A Cobb Journal: N Engl J Med Date: 1980-06-19 Impact factor: 91.245
Authors: R S Briggs; P M Brown; M E Crabb; T J Cox; H W Ead; R A Hawkes; P W Jequier; D P Southall; R Grainger; J H Williams; D A Chamberlain Journal: Br Med J Date: 1976-11-13