Affiliations

• ¹ Laboratory of Retroviruses, US Food and Drug Administration, Silver Spring, MD 20993, USA. Electronic address: arifa.khan@fda.hhs.gov.
• ² Institut für Virologie und Immunbiologie, Universität Würzburg, Würzburg, Germany.
• ³ Unit of Epidemiology and Physiopathology of Oncogenic Viruses, Institut Pasteur, Paris, France; Centre National de la Recherche Scientifique, CNRS UMR3569, Paris, France.
• ⁴ Biology Department, Boston College, Chestnut Hill, MA 02467, USA.
• ⁵ Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Frederick, MD 21702, USA.
• ⁶ Department of Biochemistry, National Veterinary Research Institute, Puławy, Poland.
• ⁷ Institute of Virology, Technische Universität Dresden, Dresden, Germany.
• ⁸ Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.
• ⁹ Research Program Infection, Inflammation and Cancer, German Cancer Research Center (DFKZ), Heidelberg, Germany.
• ¹⁰ Instituto Nacional de Câncer and Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
• ¹¹ Laboratory Branch, Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA.