[1] Univ Cambridge, Ctr Brain Repair, Cambridge, England
[2] Harvard Univ, Sch Med, Boston, MA USA
[3] Univ Washington, Div Renal, Seattle, WA USA
[4] Univ Washington, Dept Med, Ctr Lung Biol, Seattle, WA USA
[5] Univ Washington, Inst Stem Cell & Regenerat Med, Seattle, WA USA
[6] Case Western Reserve Univ, Sch Med, Dept Neurosci, Cleveland, OH 44106 USA