1. Aarsland D, Perry R, Brown A, Larsen JP, Ballard C (2005a) Neuropathology of dementia in Parkinson’s disease: a prospective, community-based study. Ann Neurol 58: 773–776
2. Aarsland D, Zaccai J, Brayne C (2005b) A systematic review of prevalence studies of dementia in Parkinson’s disease. Mov Disord 20: 1255–1263
3. Abdo WF, Borm GF, Munneke M, Verbeek MM, Esselink RA, Bloem BR (2006) Ten steps to identify atypical parkinsonism. J Neurol Neurosurg Psychiatry 77: 1367–1369
4. Adler CH, Grover AC, Sabbagh MN, Caviness JN, Connor DJ, Beach TG (2006) Clinical and pathologic findings in PD with LRRK2 mutations: 2 cases with mild cognitive impairment and small amplitude myoclonus. Mov Disord 21Suppl 15: S538
5. Ansorge O, Lees AJ, Daniel SE (1997) Update on the accuracy of clinical diagnosis of idiopathic Parkinson’s disease. Mov Disord 12Suppl 1: 96