title: [Validated guidelines].
authors.affiliation: Coordinatore Commissione Tecnica Linee Guida SIP, Direttore U.O. Pediatria, A.O. Sant'Anna, Como, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Longhi
mesh_terms: D002648:Child; D006801:Humans; D007558:Italy; D010372:Pediatrics / Q000379:methods* / Q000592:standards*; D015203:Reproducibility of Results