Migration of Th1 Lymphocytes Is Regulated by CD152 (CTLA-4)-Mediated Signaling via PI3 Kinase-Dependent Akt Activation Knieke, Karin ; Lingel, Holger ; Chamaon, Kathrin ; Brunner-Weinzierl, Monika C. Abstract Publication: PLoS ONE Pub Date: March 2012 DOI: 10.1371/journal.pone.0031391 Bibcode: 2012PLoSO...731391K