This article was republished on May 22, 2015, to correct Fig. 1, which was distorted, and to remove hyphens that were incorrectly included in the words “chaperone” and “protein” in the first sentence of the Abstract. The publisher apologizes for the errors. 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.