This article was republished on June 15, 2015, to correct an error in the title. The publisher apologizes for the error. Please download this article again to view the correct version. The originally published, uncorrected article and the republished, corrected article are provided here for reference.
Authors: Joost C M Uitdehaag; Jeroen A D M de Roos; Antoon M van Doornmalen; Martine B W Prinsen; Jill A P Spijkers-Hagelstein; Judith R F de Vetter; Jos de Man; Rogier C Buijsman; Guido J R Zaman Journal: PLoS One Date: 2015-05-27 Impact factor: 3.240