1. Institute for Virology and Cell Biology, University of Lübeck, Germany
2. Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
3. KU Leuven, Department of Microbiology, Immunology & Transplantation, Rega Institute, Laboratory of Virology & Chemotherapy, Leuven, Belgium
4. Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
5. Department of Environmental Health Sciences, University of Michigan, School of Public Health, Ann Arbor, Michigan, USA
6. College of Pharmacology, University of Michigan, Ann Arbor, Michigan, USA