1. Biomedical Research Foundation, Academy of Athens, Center for Immunology and Transplantation, Athens, Greece
2. Department of Pathology, Regional Hospital of Alexandroupolis, Alexandroupolis, Greece
3. Department of Intensive Care Medicine, Evangelismos General Hospital, Athens, Greece
4. Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki, Helsinki, Finland
5. HUSLAB, University Central Hospital of Helsinki, Helsinki, Finland
6. Department of Pathology, AstraZeneca R&D Charnwood, Loughborough, United Kingdom; and
7. Department of Pathophysiology, Athens Medical School, Athens, Greece