Retraction of: Scientific Reports https://doi.org/10.1038/srep12770, published online 31 July 2015


The Editors have retracted this article.


An investigation by Universiteit Leiden has concluded1 that that data from 16 participants were excluded from the results of the trial reported in this article. The exclusion of these data is not disclosed in the article. The Editors therefore no longer have confidence in the results and conclusions presented.


Laura Steenbergen, Roberta Sellaro, Ann-Kathrin Stock, and Christian Beste agree with this retraction. Lorenza S. Colzato disagrees with this retraction.