Authors: Karin Bok; Gabriel I Parra; Tanaji Mitra; Eugenio Abente; Charlene K Shaver; Denali Boon; Ronald Engle; Claro Yu; Albert Z Kapikian; Stanislav V Sosnovtsev; Robert H Purcell; Kim Y Green Journal: Proc Natl Acad Sci U S A Date: 2010-12-20 Impact factor: 11.205