Authors: H B Muss; L D Case; F Richards; D R White; M R Cooper; J M Cruz; B L Powell; C L Spurr; R L Capizzi Journal: N Engl J Med Date: 1991-11-07 Impact factor: 91.245
Authors: A L Harris; B M Cantwell; J Carmichael; R Wilson; J Farndon; P Dawes; S Ghani; R G Evans Journal: Lancet Date: 1990-01-27 Impact factor: 79.321