RT Journal Article SR Electronic T1 Parkinson’s disease: where do westand? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 269 OP 270 VO 60 IS 4 A2 William S. Wilke A1 Patrick J. Sweeney YR 1993 UL http://www.ccjm.org/content/60/4/269.abstract AB