Authors: W S Lim; M M van der Eerden; R Laing; W G Boersma; N Karalus; G I Town; S A Lewis; J T Macfarlane Journal: Thorax Date: 2003-05 Impact factor: 9.139
Authors: Amit X Garg; Neill K J Adhikari; Heather McDonald; M Patricia Rosas-Arellano; P J Devereaux; Joseph Beyene; Justina Sam; R Brian Haynes Journal: JAMA Date: 2005-03-09 Impact factor: 56.272
Authors: M J Fine; T E Auble; D M Yealy; B H Hanusa; L A Weissfeld; D E Singer; C M Coley; T J Marrie; W N Kapoor Journal: N Engl J Med Date: 1997-01-23 Impact factor: 91.245