1. From the Department of Immunology and Hematology, Laboratory of Hematology, Laboratory of Virology, CRC Viral Oncology Group, Department of Pathology, Hôpital Saint-Louis and the Department of Dermatology, NADER, Hôpital Tarnier-Cochin, Paris, France; the Department of Histopathology, Royal Free and University College Medical School, and The Wolfson Institute for Biomedical Research, University College London, London, United Kingdom.