Authors: Gordon T Taylor; Frank E Muller-Karger; Robert C Thunell; Mary I Scranton; Yrene Astor; Ramon Varela; Luis Troccoli Ghinaglia; Laura Lorenzoni; Kent A Fanning; Sultan Hameed; Owen Doherty Journal: Proc Natl Acad Sci U S A Date: 2012-10-15 Impact factor: 11.205