1. From the Laboratory of Clinical Pathology, Ospedale Civile, Latisana Italy (Dr Tozzoli); the Department of Clinical Pathology, Ospedale San Bortolo, Vicenza, Italy (Drs Giavarina and Soffiati); the Allergology and Clinical Immunology, Azienda Ospedaliera Santa Maria degli Angeli, Pordenone, Italy (Dr Villalta); and the Laboratory of Clinical Pathology, Ospedale Civile,Tolmezzo, Italy (Dr Bizzaro)