HLA-Cw*04 and Hepatitis C Virus Persistence, Chloe L. Thio, Xiaojiang Gao, James J. Goedert, David Vlahov, Kenrad E. Nelson, Margaret Hilgartner, Stephen J. O'Brien, Peter Karacki, Jacquie Astemborski, Mary Carrington, David L. Thomas Stephen O'Brien