%0 Journal Article %T Levodopa Slows Progression of Parkinson’s Disease. External Validation by Clinical Trial Simulation %A Chan, Phylinda %A Nutt, John %A Holford, Nicholas %J Pharmaceutical Research %V 24 %N 4 %P 791-802 %@ 0724-8741 %D 2007-02-17 %I Kluwer Academic Publishers-Plenum Publishers %~ DeepDyve