RT Journal Article SR Electronic T1 Cutting Both Ways JF Science JO Science FD American Association for the Advancement of Science SP 2173 OP 2173 DO 10.1126/science.297.5590.2173a VO 297 IS 5590 A1 Chin, Gilbert J. YR 2002 UL http://science.sciencemag.org/content/297/5590/2173.1.abstract AB