Authors: C E Dionne; M Von Korff; T D Koepsell; R A Deyo; W E Barlow; H Checkoway Journal: J Epidemiol Community Health Date: 2001-07 Impact factor: 3.710
Authors: W R Lange; D L Frankenfield; J Carico; M B Pfeiffer; F R Snyder; J Van Der Decker Journal: Public Health Rep Date: 1992 Mar-Apr Impact factor: 2.792