1. Departments of Dermatology Saint‐Louis Hospital, AP‐HP, Paris 7 University 1 avenue Claude Vellefaux 75010 Paris France
2. Immunology (Inserm U1160) Saint‐Louis Hospital, AP‐HP, Paris 7 University 1 avenue Claude Vellefaux 75010 Paris France
3. Hemato‐oncology Saint‐Louis Hospital, AP‐HP, Paris 7 University 1 avenue Claude Vellefaux 75010 Paris France
4. Departments of Hematology‐Bone Marrow Transplantation Saint‐Louis Hospital, AP‐HP, Paris 7 University 1 avenue Claude Vellefaux 75010 Paris France
5. Departments of Pathology (Inserm U976) Saint‐Louis Hospital, AP‐HP, Paris 7 University 1 avenue Claude Vellefaux 75010 Paris France
6. Pharmacy Saint‐Louis Hospital, AP‐HP, Paris 7 University 1 avenue Claude Vellefaux 75010 Paris France