Authors: Patrick J Mulholland; Ashley M Helton; Geoffrey C Poole; Robert O Hall; Stephen K Hamilton; Bruce J Peterson; Jennifer L Tank; Linda R Ashkenas; Lee W Cooper; Clifford N Dahm; Walter K Dodds; Stuart E G Findlay; Stanley V Gregory; Nancy B Grimm; Sherri L Johnson; William H McDowell; Judy L Meyer; H Maurice Valett; Jackson R Webster; Clay P Arango; Jake J Beaulieu; Melody J Bernot; Amy J Burgin; Chelsea L Crenshaw; Laura T Johnson; B R Niederlehner; Jonathan M O'Brien; Jody D Potter; Richard W Sheibley; Daniel J Sobota; Suzanne M Thomas Journal: Nature Date: 2008-03-13 Impact factor: 49.962