Authors: Juan-Carlos Ciscar; Ana Iglesias; Luc Feyen; László Szabó; Denise Van Regemorter; Bas Amelung; Robert Nicholls; Paul Watkiss; Ole B Christensen; Rutger Dankers; Luis Garrote; Clare M Goodess; Alistair Hunt; Alvaro Moreno; Julie Richards; Antonio Soria Journal: Proc Natl Acad Sci U S A Date: 2011-01-31 Impact factor: 11.205