GUCA2A and obesity due to melanocortin 4 receptor deficiency: JE Lin, F Colon-Gonzalez, E Blomain, GW Kim, A Aing, B Stoecker, J Rock, AE Snook, T Zhan, T Hyslop, M Tomczak, RS Blumberg, SA Waldman: Calories suppress guanylin silencing the GUCY2C tumor suppressor in colorectal cancer in obesity.Can.