1. Laboratory of Molecular Virology and Biological Chemistry, Institute of Medical Biology; Polish Academy of Sciences; Lodz Poland
2. Department of Clinical Microbiology and Immunology; The Children's Memorial Health Institute; Warsaw Poland
3. Department of Virology; Jagiellonian University Medical College; Cracow Poland
4. 3rd Department of Pediatrics, Polish Mother's Memorial Hospital; Research Institute; Lodz Poland