1. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia
2. Department of Pathology, The University of Arizona College of Medicine, Tucson
3. Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia
4. Department of Dermatology and Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia
5. Division of Hematology and Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia