Notch signalling regulates stem cell numbers in vitro and in vivo - Androutsellis-Theotokis, A; Leker, R R; Soldner, F; Hoeppner, D J; Ravin, R; Poser, S W; Rueger, M A; Bae, S K; Kittappa, R; McKay, R D (Nature, 2006)