Authors: John C Tran; Leonid Zamdborg; Dorothy R Ahlf; Ji Eun Lee; Adam D Catherman; Kenneth R Durbin; Jeremiah D Tipton; Adaikkalam Vellaichamy; John F Kellie; Mingxi Li; Cong Wu; Steve M M Sweet; Bryan P Early; Nertila Siuti; Richard D LeDuc; Philip D Compton; Paul M Thomas; Neil L Kelleher Journal: Nature Date: 2011-10-30 Impact factor: 49.962