International Journal of Behavioral Medicine (2012) - Comment
pubmed: 21786145  doi: 10.1007/s12529-011-9181-6  issn: 1532-7558  issn: 1070-5503 

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Sergei A. Schapkin, Gabriele Freude, Patrick D. Gajewski, Nele Wild-Wall, Michael Falkenstein