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Schulz A, Lass-Hennemann J, Nees F, Blumenthal TD, Berger W, Schachinger H.Schulz A, et al.Psychophysiology. 2009 Mar;46(2):234-40. doi: 10.1111/j.1469-8986.2008.00768.x. Epub 2009 Jan 19.Psychophysiology. 2009.PMID: 19207206