Correction: Delayed Goblet Cell Hyperplasia, Acetylcholine Receptor Expression, and Worm Expulsion in SMC-Specific IL-4Rα–Deficient Mice. - William G. C Horsnell; Antony J Cutler; J. Claire Hoving; Helen Mearns; Elmarie Myburgh; Berenice Arendse; Fred D Finkelman; Gary K Owens; Dave Erle; Frank Brombacher (PLoS Pathogens, 2007)