The CTRB1/2 locus affects diabetes susceptibility and treatment via the incretin pathway.
't Hart LM, Fritsche A, Nijpels G, van Leeuwen N, Donnelly LA, Dekker JM, Alssema M, Fadista J, Carlotti F, Gjesing AP, et al. Diabetes. 2013 Sep; 62(9):3275-81. Epub 2013 May 14.