1 Katholieke Universiteit Leuven, Department of Microbiology and Immunology, Laboratory of Clinical and Epidemiological Virology, Leuven 3000, Belgium. Electronic address: mahmoudreza.pourkarim@kuleuven.be.
2 Center for Disease Analysis Foundation, Lafayette, CO, USA.
3 Katholieke Universiteit Leuven, Department of Microbiology and Immunology, Laboratory of Clinical and Epidemiological Virology, Leuven 3000, Belgium.