1. Immunobiology and Vaccinology Research Laboratory, Aghia Sophia Children’s Hospital
2. Infectious Disease Unit, 3rd Internal Medicine Department, Korgialeneio-Benakeio Hospital
3. Department of Immunology and Histocompatibility, Aghia Sophia Children’s Hospital
4. Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens, Greece