Variable Patterns of Programmed Death-1 Expression on Fully Functional Memory T Cells after Spontaneous Resolution of Hepatitis C Virus Infection

David G. Bowen, Naglaa H. Shoukry, Arash Grakoui, Michael J. Fuller, Andrew G. Cawthon, Christine Dong, Dana L. Hasselschwert, Kathleen M. Brasky, Gordon J. Freeman, Nilufer P. Seth, Kai W. Wucherpfennig, Michael Houghton and Christopher M. Walker

Journal of Virology 82 ( 10 ): 5109 - 5114 , 2008