Department of Oncovirology, Augusts Kirhenšteins Institute of Microbiology and Virology, Rīga Stradiņš University, Rātsupītes iela 5, Rīga, LV-1067, LATVIA
Section of Clinical Virology, Department of Medical Sciences, Uppsala University Hospital, Dag Hammarskjölds väg 17, 751 85 Uppsala, Sweden