| CDC | US Centers for Disease Control and Prevention |
| CROSS | Checklist for Reporting of Survey Studies |
| GAS | Group A Streptococcus |
| iGAS | Invasive GAS |
| IVIG | Intravenous Immunoglobulins |
| NF | Necrotizing Fasciitis |
| PID | Pediatric Infectious Diseases |
| SITIP | Italian Society of Pediatric Infectious Diseases |
| STSS | Streptococcal Toxic Shock Syndrome |
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