Authors: Alexander A Navarini; Mike Recher; Karl S Lang; Panco Georgiev; Susanne Meury; Andreas Bergthaler; Lukas Flatz; Jacques Bille; Regine Landmann; Bernhard Odermatt; Hans Hengartner; Rolf M Zinkernagel Journal: Proc Natl Acad Sci U S A Date: 2006-10-09 Impact factor: 11.205