1. Medical Oncology Unit, Department of Oncology and Hematology, Central Hospital of Belcolle, 01100 Viterbo, Italy
2. Thoracic Oncology Unit, Department of Oncology and Hematology, Central Hospital of Belcolle, 01100 Viterbo, Italy
3. Biostatistics Unit, Scientific Directorate, Fondazione Policlinico Universitario A. Gemelli, IRCCS, 00168 Rome, Italy
4. Cytofluorimetry Unit, Department of Oncology and Hematology, Central Hospital of Belcolle, 01100 Viterbo, Italy
5. Microbiology and Virology Unit, Department of Oncology and Hematology, Central Hospital of Belcolle, 01100 Viterbo, Italy