1. Laboratory of Gene Therapy of Viral Hepatitis, Division of Gene Therapy and Hepatology, Center for Applied Medical Research (CIMA), University of Navarra, 31080 Pamplona, Navarra, Spain.
2. Present adress: Régulation Immunitaire et Vaccinologie, Institut Pasteur, 75724 Paris, France.
3. Department of Pharmacy, School of Pharmacy, University of Navarra, 31008 Pamplona, Navarra, Spain.