Authors: BUTTERFIELD PG SPENCER PS REDMOND N FELDSTEIN A PERRIN N

Citation: Pg. Butterfield et al., LOW-BACK-PAIN - PREDICTORS OF ABSENTEEISM, RESIDUAL SYMPTOMS, FUNCTIONAL IMPAIRMENT, AND MEDICAL COSTS IN OREGON WORKERS-COMPENSATION RECIPIENTS, American journal of industrial medicine, 34(6), 1998, pp. 559-567

Authors: BUTTERFIELD PG SPENCER PS REDMOND N ROSENBAUM R ZIRKLE DF

Citation: Pg. Butterfield et al., CLINICAL AND EMPLOYMENT OUTCOMES OF CARPAL-TUNNEL SYNDROME IN OREGON WORKERS COMPENSATION RECIPIENTS, Journal of occupational rehabilitation, 7(2), 1997, pp. 61-73

Authors: BUTTERFIELD PG VALANIS BG SPENCER PS LINDEMAN CA NUTT JG

Citation: Pg. Butterfield et al., ENVIRONMENTAL ANTECEDENTS OF YOUNG-ONSET PARKINSONS-DISEASE, Neurology, 43(6), 1993, pp. 1150-1158