1. Department of Pathology, University of Texas Medical Branch, Galveston, TX, USA
2. Department of Pediatrics, University of Texas Medical Branch, Galveston, TX, USA
3. Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX, USA
4. Department of Rare and Emerging Viral Infections and Response, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands