RT Journal Article SR Electronic T1 2015 Update on Parkinson disease JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 563 OP 568 DO 10.3949/ccjm.82gr.15004 VO 82 IS 9 A1 Hubert H. Fernandez YR 2015 UL http://www.ccjm.org/content/82/9/563.abstract AB Parkinson disease is still diagnosed by clinical signs, and its most effective treatment is still levodopa. However, an improved understanding of the disease is leading to new diagnostic tools and treatments.