Authors: Andrew D Maynard; Robert J Aitken; Tilman Butz; Vicki Colvin; Ken Donaldson; Günter Oberdörster; Martin A Philbert; John Ryan; Anthony Seaton; Vicki Stone; Sally S Tinkle; Lang Tran; Nigel J Walker; David B Warheit Journal: Nature Date: 2006-11-16 Impact factor: 49.962