1. Laboratory of Parasitology, Hellenic Pasteur Institute, Athens, Greece
2. Department of Pediatrics, Aristotle University of Thessaloniki, Greece
3. Department of Pharmacology and Experimental Therapeutics, Tufts University School of Medicine, Boston, MA 02111, U.S.A.
4. Dipartmento di Science Cliniche e Bioimmagini, University of Chieti, Chieti, Italy
5. Immunology Division, University of Chieti, Chieti, Italy
6. Department of Biomedical Sciences and Department of Medicine, University of Chieti, Chieti, Italy