1. Unité d’Epidémiologie et Physiopathologie des Virus Oncogènes, Institut Pasteur, UMR3569 CNRS, Université de Paris, Paris, France
2. Service d’Hématologie, Hôpital Necker-Enfants Malades, Paris, France
3. Département de Neurologie, Fondation Rothschild, Paris, France
4. Department of Infectious Disease, Imperial College, London, United Kingdom
5. UNIR Health Sciences School and Medical Center, Madrid, Spain
6. Internal Medicine Laboratory Puerta de Hierro Research Institute, University Hospital Majadahonda, Madrid, Spain