%0 Journal Article %A David J Burn %A Roger A Barker %T Mild cognitive impairment in Parkinson's disease: millstone or milestone? %D 2013 %R 10.1136/practneurol-2013-000539 %J Practical Neurology %P 68-69 %V 13 %N 2 %U https://pn.bmj.com/content/practneurol/13/2/68.full.pdf