1. Department
of Microbiology, Immunology and Cancer Biology, University of Virginia School of Medicine, Jordan Hall, Box 441, Charlottesville, Virginia 22908, United States
2. Department
of Pathology, University of Virginia School of Medicine, P.O. Box 800904, Charlottesville, Virginia 22908, United States
3. Department
of Radiology, University of Virginia School of Medicine, P.O. Box 800170, Charlottesville, Virginia 22908, United States
4. Department
of Dermatology, University of Cologne, Kerpener Str. 62, Cologne D-50937, Germany