Erratum: A reserve stem cell population in small intestine renders Lgr5 -positive cells dispensable

Nature 478, 255–259 (2011). In this Letter, two additional references32, 33, which described stem-cell organization in the intestinal crypt, should have been cited after the first sentence of the main text: “Two types of stem cells have been described in the small intestine based on location and cycling dynamics1–4, 32, 33.