1 Department of Infectious Disease and Vaccines, Merck & Co., Inc., Kenilworth, NJ, United States.
2 Department of Molecular Medicine, University of Padua, Padua, Italy.
3 Department of Molecular Virology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
4 Department of Microbiology and Immunology, Institute of Human Virology, School of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States.
5 Department of Biological Sciences, Misher College of Arts and Sciences, University of the Sciences in Philadelphia, Philadelphia, PA, United States.