Authors: L L Leape; T A Brennan; N Laird; A G Lawthers; A R Localio; B A Barnes; L Hebert; J P Newhouse; P C Weiler; H Hiatt Journal: N Engl J Med Date: 1991-02-07 Impact factor: 91.245
Authors: R M Tamblyn; P J McLeod; M Abrahamowicz; J Monette; D C Gayton; L Berkson; W D Dauphinee; R M Grad; A R Huang; L M Isaac Journal: CMAJ Date: 1994-06-01 Impact factor: 8.262