Authors: M B Maple; N P Butch; N A Frederick; P-C Ho; J R Jeffries; T A Sayles; T Yanagisawa; W M Yuhasz; Songxue Chi; H J Kang; J W Lynn; Pengcheng Dai; S K McCall; M W McElfresh; M J Fluss; Z Henkie; A Pietraszko Journal: Proc Natl Acad Sci U S A Date: 2006-04-21 Impact factor: 11.205