1. The Jake Gittlen Cancer Research Foundation and Department of Pathology
2. Department of Dermatology, Stanford University School of Medicine, Stanford, California 94305
3. INSERM U634, Faculté de Médecine, Université de Nice, F-06107 Nice Cedex, France
4. Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033