1. Institute of Clinical Pharmacology; University Teaching Hospital of Udine; Udine Italy
2. Department of Experimental and Clinical Medical Sciences; University of Udine; Udine Italy
3. Division of Haematology; University Teaching Hospital of Udine; Udine Italy
4. Department of Medical and Surgical Sciences; Section of Haematology; University of Modena and Reggio Emilia; University Teaching Hospital of Modena; Modena Italy
5. Department of Medical and Biological Sciences; Section of Statistics; University of Udine; Udine Italy