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Proliferation of functional magnetic resonance imaging (fMRI) studies in reward processing. The use of fMRI to study reward processing has been increasingly popular over the past 20 yr. During this time, the number of publications on fMRI and reward has increased quasi-exponentially. We note that the shown data were extracted from http://www.ncbi.nlm.nih.gov/pubmed/ on February 13, 2016 using the search term “(fMRI OR functional magnetic resonance imaging) AND reward.”
