1. Pediatric Department, CHU St Pierre, Brussels, Belgium
2. Inserm, U822, Le Kremlin-Bicêtre, France
3. Italian Register, Department of Paediatrics, University of Florence, Italy
4. P-HP, Hôpital Trousseau, Service d’Hématologie et d’oncologie pédiatrique, Paris, France
5. MRC Centre of Epidemiology for Child Health, Institute of Child Health, University College London
6. Collaborative HIV Paediatric Study, MRC Clinical Trials Unit, London, United Kingdom
7. Data Center of the Swiss HIV Cohort Study, Lausanne
8. Institute of Social and Preventive Medicine, University of Bern, Switzerland
9. Pediatric Department, Hospital Universitario de Getafe, Madrid, Spain
10. Université Paris-Sud, Faculté de Médecine Paris-Sud, U822, Le Kremlin-Bicêtre, France