1. Paediatric Department‐Division of infectious disease Armand Trousseau Hospital, AP‐HP Paris France
2. Department of Pediatric Orthopedic Surgery Robert Debré Hospital AP‐HP Paris France
3. Department of Pediatric Emergency Care Inserm U1123 and CIC‐EC 1426, Inserm, U1138, Equipe 22 Robert Debré Hospital AP‐HP Université Paris Diderot Sorbonne Paris‐Cité Paris France
4. Department of Microbiology Associated‐National Reference Center for Escherichia Coli UMR 1137, INSERM Robert Debré Hospital APHP Paris France
5. Pediatric Department Centre hospitalier de Blois Blois France
6. Department of Pediatric Orthopedic Surgery Armand Trousseau Hospital APHP Paris France
7. GPIP, Groupe de Pathologie Infectieuse Pédiatrique Société Française de Pédiatrie Paris France
8. Pediatric Orthopedic Surgery Necker‐Enfants‐Malades Hospital AP‐HP Paris France
9. Inserm UMR 1123 ECEVE Sorbonne Paris Cité France