Study: NCT03980522

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: KPL-914
Description: KPL-914 (rilonacept) will be provided in its commercially available formulation as a lyophilized powder to be reconstituted for SC administration.~Adult participants (≥ 18 years of age) KPL-914 will be administered as an initial loading dose of 320 mg SC, delivered as 2 subcutaneous injections of 160 mg SC each on Day 0, then 160 mg SC dosed once weekly for 5 subsequent weeks.~Pediatric participants (6 to \<18 years of age) KPL-914 will be administered with an initial loading dose of 4.4 mg/kg, up to a maximum of 320 mg, delivered as 2 subcutaneous injections of 2.2 mg/kg each with a maximum single-injection volume of 2 mL.~Participants considered to be 'treatment responders' will be offered participation in an optional 18-week extension period (EP) in which KPL-914 can be continued for a total duration of KPL-914 treatment of up to 24 weeks.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: KPL-914
Description: KPL-914 (rilonacept) will be provided in its commercially available formulation as a lyophilized powder to be reconstituted for SC administration.~Adult participants (≥ 18 years of age) KPL-914 will be administered as an initial loading dose of 320 mg SC, delivered as 2 subcutaneous injections of 160 mg SC each on Day 0, then 160 mg SC dosed once weekly for 5 subsequent weeks.~Pediatric participants (6 to \<18 years of age) KPL-914 will be administered with an initial loading dose of 4.4 mg/kg, up to a maximum of 320 mg, delivered as 2 subcutaneous injections of 2.2 mg/kg each with a maximum single-injection volume of 2 mL.~Participants considered to be 'treatment responders' will be offered participation in an optional 18-week extension period (EP) in which KPL-914 can be continued for a total duration of KPL-914 treatment of up to 24 weeks.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: KPL-914
Description: KPL-914 (rilonacept) will be provided in its commercially available formulation as a lyophilized powder to be reconstituted for SC administration.~Adult participants (≥ 18 years of age) KPL-914 will be administered as an initial loading dose of 320 mg SC, delivered as 2 subcutaneous injections of 160 mg SC each on Day 0, then 160 mg SC dosed once weekly for 5 subsequent weeks.~Pediatric participants (6 to \<18 years of age) KPL-914 will be administered with an initial loading dose of 4.4 mg/kg, up to a maximum of 320 mg, delivered as 2 subcutaneous injections of 2.2 mg/kg each with a maximum single-injection volume of 2 mL.~Participants considered to be 'treatment responders' will be offered participation in an optional 18-week extension period (EP) in which KPL-914 can be continued for a total duration of KPL-914 treatment of up to 24 weeks.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: KPL-914
Description: KPL-914 (rilonacept) will be provided in its commercially available formulation as a lyophilized powder to be reconstituted for SC administration.~Adult participants (≥ 18 years of age) KPL-914 will be administered as an initial loading dose of 320 mg SC, delivered as 2 subcutaneous injections of 160 mg SC each on Day 0, then 160 mg SC dosed once weekly for 5 subsequent weeks.~Pediatric participants (6 to \<18 years of age) KPL-914 will be administered with an initial loading dose of 4.4 mg/kg, up to a maximum of 320 mg, delivered as 2 subcutaneous injections of 2.2 mg/kg each with a maximum single-injection volume of 2 mL.~Participants considered to be 'treatment responders' will be offered participation in an optional 18-week extension period (EP) in which KPL-914 can be continued for a total duration of KPL-914 treatment of up to 24 weeks.