1. Departments of Medicine, Microbiology and Immunology, Health Science Center, State University of New York at Syracuse, Syracuse, New York, U.S.A.,
2. Department of Pathology, Stanford University School of Medicine, Stanford, California, U.S.A.,
3. Department of Pathology, Health Science Center, State University of New York at Syracuse, Syracuse, New York, U.S.A.,
4. Department of Medicine, University of Calgary, Health Sciences Centre, Calgary, Alberta, Canada,
5. Department of Surgery, Health Science Center, State University of New York at Syracuse, Syracuse, New York, U.S.A.,
6. Department of Medicine, Vancouver Hospital and Health Sciences Centre, Vancouver, B.C., Canada,
7. Department of Veterans Affairs Medical Center, Syracuse, New York, U.S.A.