1. Division of Tropical and Infectious Diseases; San Matteo Hospital Foundation; Pavia Italy
2. WHO Collaborating Centre for Clinical Management of Cystic Echinococcosis; Pavia Italy
3. Department of Clinical Surgical Diagnostic and Pediatric Sciences; University of Pavia; Pavia Italy
4. Department of Internal medicine and Medical Therapy; University of Pavia; Pavia Italy
5. Microbiology and Virology Unit; San Matteo Hospital Foundation; Pavia Italy
6. Immunogenetics Laboratory; Immunohematology and Transfusion Center; San Matteo Hospital Foundation; Pavia Italy
7. Clinical Epidemiology and Biometry Unit; San Matteo Hospital Foundation; Pavia Italy
8. Department of Infectious; Parasitic and Immunomediated Diseases; Istituto Superiore di Sanita’; Roma Italy