1. Vaccine and Immunotherapy Center, The Wistar Institute of Anatomy and Biology, Philadelphia, PA, USA
2. Rocky Mountain Laboratories, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
3. Inovio Pharmaceuticals, Plymouth Meeting, PA, USA
4. Vaccines & Immune Therapies, BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, MD, USA