Update 'README.md'

README.md

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 # VP_RPE_2020
-Data and analysis for our 2020 manuscript "A quantitative reward prediction error signal in ventral pallidum" in Nature Neuroscience. And earlier version of the manuscript is available on bioRxiv: https://doi.org/10.1101/807842
+Data and analysis for our 2020 manuscript "A quantitative reward prediction error signal in ventral pallidum" in Nature Neuroscience. An earlier version of the manuscript is available on bioRxiv: https://doi.org/10.1101/807842
 
 All of the preprocessed data is available in the “Data" folder. There you can also find Matlab data files created with scripts in the MatlabScripts folders “1_InitialAnalysis” and “2_Modeling”. Note you have to download the .zip files in the Data folder individually.