Authors: D K Henderson; B J Fahey; M Willy; J M Schmitt; K Carey; D E Koziol; H C Lane; J Fedio; A J Saah Journal: Ann Intern Med Date: 1990-11-15 Impact factor: 25.391
Authors: G T O'Connor; S K Plume; E M Olmstead; L H Coffin; J R Morton; C T Maloney; E R Nowicki; J F Tryzelaar; F Hernandez; L Adrian Journal: JAMA Date: 1991-08-14 Impact factor: 56.272