1. From the Clinical Pathology Unit, ASST Fatebenefratelli-Sacco, Milan, Italy (Aloisio, Chibireva, Serafini, Pasqualetti, Falvella, Dolci, Panteghini)
2. The Department of Biomedical and Clinical Sciences “Luigi Sacco,” University of Milan, Milan, Italy (Dolci, Panteghini)