Down-Regulation of CTLA-4 by HIV-1 Nef Protein El-Far, Mohamed ; Isabelle, Catherine ; Chomont, Nicolas ; Bourbonnière, Martin ; Fonseca, Simone ; Ancuta, Petronela ; Peretz, Yoav ; Chouikh, Younes ; Halwani, Rabih ; Schwartz, Olivier ; Madrenas, Joaquín ; Freeman, Gordon J. ; Routy, Jean-Pierre ; Haddad, Elias K. ; Sékaly, Rafick-Pierre Abstract Publication: PLoS ONE Pub Date: January 2013 DOI: 10.1371/journal.pone.0054295 Bibcode: 2013PLoSO...854295E