1. Microbiology, Immunology and Virology Unit, Centro di Riferimento Oncologico, IRCCS, Aviano, Italy.
2. Epidemiology and Biostatistics Unit, Centro di Riferimento Oncologico, IRCCS, Aviano, Italy.
3. Division of Medical Oncology A, Centro di Riferimento Oncologico, IRCCS, Aviano, Italy.
4. Blood Bank and Department of Clinical Pathology and Immunohaematology, Centro di Riferimento Oncologico, IRCCS, Aviano, Italy.
5. Scientific Directorate, Centro di Riferimento Oncologico, IRCCS, Aviano, Italy.