1. Department of VirologyInstitute of Haematology and Transfusion MedicineWarsaw Poland
2. Department of VirologyNational Institute of Public Health—National Institute of HygieneWarsaw Poland
3. Labolatory of Infectious Diseases Transmitted by Blood, Regional Blood Transfusion CenterKalisz Poland
4. Department of Testing for Infectious Diseases Transmitted by TransfusionMilitary Blood Transfusion CenterWarsaw Poland
5. Laboratory of Infectious Diseases Serodiagnostics, Regional Blood Transfusion CenterWrocław Poland
6. Department of Adult Infectious DiseasesWarsaw Medical UniversityWarsaw Poland
7. Department of Immunopathology of Infectious and Parasitic DiseasesWarsaw Medical UniversityWarsaw Poland