1. Drexel Institute for Biotechnology and Virology Research, Department of Microbiology and Immunology, Drexel University College of Medicine, Doylestown, Pennsylvania 18901, The Institute for Virus and Hepatitis Research, Pennsylvania Commonwealth Institute, Doylestown, Pennsylvania 18901, Immunotope Inc., Doylestown, Pennsylvania 18901, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, and Division of Gastroenterology and Hepatology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107