title: Reply to letter by Isenberg and Gordon commenting on the Pediatric Rheumatology International Trials Organization criteria for the evaluation of response to therapy in juvenile systemic lupus erythematosus.
authors.forename: Nicolino
authors.initials: N
authors.lastname: Ruperto
authors.forename: Angelo
authors.initials: A
authors.lastname: Ravelli
authors.forename: Alberto
authors.initials: A
authors.lastname: Martini
mesh_terms: D002648:Child; D002986:Clinical Trials as Topic; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000503:physiopathology* / Q000628:therapy*; D010372:Pediatrics / Q000458:organization & administration; D012219:Rheumatology / Q000458:organization & administration; D012720:Severity of Illness Index