Authors: J M Drazen; E Israel; H A Boushey; V M Chinchilli; J V Fahy; J E Fish; S C Lazarus; R F Lemanske; R J Martin; S P Peters; C Sorkness; S J Szefler Journal: N Engl J Med Date: 1996-09-19 Impact factor: 91.245
Authors: D Erzen; K C Carriere; N Dik; C Mustard; L L Roos; J Manfreda; N R Anthonisen Journal: Am J Respir Crit Care Med Date: 1997-03 Impact factor: 21.405
Authors: P Ernst; B Habbick; S Suissa; B Hemmelgarn; D Cockcroft; A S Buist; R I Horwitz; M McNutt; W O Spitzer Journal: Am Rev Respir Dis Date: 1993-07
Authors: W O Spitzer; S Suissa; P Ernst; R I Horwitz; B Habbick; D Cockcroft; J F Boivin; M McNutt; A S Buist; A S Rebuck Journal: N Engl J Med Date: 1992-02-20 Impact factor: 91.245
Authors: M R Sears; D R Taylor; C G Print; D C Lake; Q Q Li; E M Flannery; D M Yates; M K Lucas; G P Herbison Journal: Lancet Date: 1990-12-08 Impact factor: 79.321