title: Graft-versus-host disease is  ameliorated by blocking of  IL-21 signaling.
authors.affiliation: AIRC Laboratory of Immunology & Tumors, Department of Experimental & Laboratory Medicine, Istituto Giannina Gaslini, Genova, Italy.
authors.forename: Claudia
authors.initials: C
authors.lastname: Cocco
authors.forename: Irma
authors.initials: I
authors.lastname: Airoldi