Authors: David B Rozema; David L Lewis; Darren H Wakefield; So C Wong; Jason J Klein; Paula L Roesch; Stephanie L Bertin; Tom W Reppen; Qili Chu; Andrei V Blokhin; James E Hagstrom; Jon A Wolff Journal: Proc Natl Acad Sci U S A Date: 2007-07-24 Impact factor: 11.205