[1] Univ Hosp Verona, Clin Biochem Sect, Ple LA Scuro 10, I-37134 Verona, Italy
[2] Italian Soc Clin Biochem & Lab Med, Milan, Italy
[3] Univ Palermo, Sect Clin Biochem & Mol Med, Palermo, Italy
[4] St Bortolo Hosp, Clin Chem & Hematol Lab, Vicenza, Italy