Authors: R Schiffmann; G J Murray; D Treco; P Daniel; M Sellos-Moura; M Myers; J M Quirk; G C Zirzow; M Borowski; K Loveday; T Anderson; F Gillespie; K L Oliver; N O Jeffries; E Doo; T J Liang; C Kreps; K Gunter; K Frei; K Crutchfield; R F Selden; R O Brady Journal: Proc Natl Acad Sci U S A Date: 2000-01-04 Impact factor: 11.205