1 Molecular Virology and Hepatology Research Group, Division of BioMedical Sciences, Faculty of Medicine, Health Sciences Centre, Memorial University, St. John¿s, Newfoundland and Labrador, Canada
2 Present address: Department of Immunology, Medical Sciences Building, University of Toronto, Toronto, ON, Canada
3 Present address: Laboratory of Human Retrovirology, Institut de Recherches Cliniques de Montreal (IRCM), Montreal, QC, Canada