Loss of Gata4 in Sertoli cells impairs the spermatogonial stem cell niche and causes germ cell exhaustion by attenuating chemokine signaling - Chen, S R; Tang, J X; Cheng, J M; Li, J; Jin, C; Li, X Y; Deng, X L; Zhang, Y; Wang, X X; Liu, Y X (Oncotarget, 2015)