Authors: W A Stack; S D Mann; A J Roy; P Heath; M Sopwith; J Freeman; G Holmes; R Long; A Forbes; M A Kamm Journal: Lancet Date: 1997-02-22 Impact factor: 79.321
Authors: O O Thomsen; A Cortot; D Jewell; J P Wright; T Winter; F T Veloso; M Vatn; T Persson; E Pettersson Journal: N Engl J Med Date: 1998-08-06 Impact factor: 91.245