1. Department of General Pediatrics and Pediatric Infectious Diseases, Necker-Enfants-Malades University Hospital
2. M3C-Necker Enfants Malades, Assistance Publique – Hôpitaux de Paris, Université Paris Cité
3. Institut Pasteur, Invasive bacterial infections unit and National Reference Center for meningococci and Haemophilus influenzae, Paris, France.