1. 1Department of Medicine,
2. 2Department of Applied Mathematics and Statistics, and
3. 3Department of Microbiology and Immunology, State University of New York at Stony Brook, Stony Brook, NY;
4. 4Department of Medicine and Surgery, University of Milan Bicocca, Milan, Italy; and
5. 5Department of Immunohematology and Transfusion Medicine, Hospital Papa Giovanni XXIII, Bergamo, Italy