The FOXP1, FOXP2 and FOXP4 transcription factors are required for islet alpha cell proliferation and function in mice - Spaeth, JM; Hunter, CS; Bonatakis, L; Guo, M; French, CA; Slack, I; Hara, M; Fisher, SE; Ferrer, J; Morrisey, EE; Stanger, BZ; Stein, R (Diabetologia, 2015)