Authors: Shang-Hsun Yang; Pei-Hsun Cheng; Heather Banta; Karolina Piotrowska-Nitsche; Jin-Jing Yang; Eric C H Cheng; Brooke Snyder; Katherine Larkin; Jun Liu; Jack Orkin; Zhi-Hui Fang; Yoland Smith; Jocelyne Bachevalier; Stuart M Zola; Shi-Hua Li; Xiao-Jiang Li; Anthony W S Chan Journal: Nature Date: 2008-05-18 Impact factor: 49.962