Authors: A Schuchat; K Robinson; J D Wenger; L H Harrison; M Farley; A L Reingold; L Lefkowitz; B A Perkins Journal: N Engl J Med Date: 1997-10-02 Impact factor: 91.245
Authors: David Brealey; Michael Brand; Iain Hargreaves; Simon Heales; John Land; Ryszard Smolenski; Nathan A Davies; Chris E Cooper; Mervyn Singer Journal: Lancet Date: 2002-07-20 Impact factor: 79.321