Authors: Jyothi M Ketavarapu; Annette R Rodriguez; Jieh-Juen Yu; Yu Cong; Ashlesh K Murthy; Thomas G Forsthuber; M Neal Guentzel; Karl E Klose; Michael T Berton; Bernard P Arulanandam Journal: Proc Natl Acad Sci U S A Date: 2008-06-30 Impact factor: 11.205