We assessed set shifting using Wisconsin Card Sorting Test and Trail-Making Test (B-A),[Uc, Rizzo, Johnson, Dastrup, Anderson, and Dawson2009] visual perception using Judgment of Line Orientation and Complex Figure Test (CFT)-Copy, verbal memory using Rey Auditory Verbal Learning Test, visual memory using CFT-Recall, language using Controlled Oral Word Association Test,[Uc, Rizzo, Johnson, Dastrup, Anderson, and Dawson2009] and general cognition using Montreal Cognitive Assessment.[Chou et al. 2010] Parkinsonism: Unified Parkinson's Disease Rating Scale and timed motor tests (7m Walk and finger tapping),[Defer et al. 1999] Functional Reach test for balance,[Uc, Rizzo, Johnson, Dastrup, Anderson, and Dawson2009] total daily levodopa equivalents,[Tomlinson et al. 2010] and a patient diary [Hauser et al. 2004].