Preconditioning allows engraftment of mouse and human embryonic lung cells, enabling lung repair in mice. - Rosen C; Shezen E; Aronovich A; Klionsky YZ; Yaakov Y; Assayag M; Biton IE; Tal O; Shakhar G; Ben-Hur H; Shneider D; Vaknin Z; et al. (Nature medicine, 2015)