Leedham, S. J., Rodenas-Cuadrado, P., Howarth, K., Lewis, A., Mallappa, S., Segditsas, S., et al. (2013).
A basal gradient of Wnt and stem-cell number influences regional tumour distribution in human and mouse intestinal tracts. Gut, 62(1), 83-93. doi:10.1136/gutjnl-2011-301601.