The purpose of this clinical research study is to learn if Abatacept or Infliximab in combination with Methotrexate demonstrate a greater reduction in disease activity over placebo.
Abatacept, intravenous (IV) Solution, Infusion, Depends on participant weight, Monthly, 12 months.
Infliximab, IV Solution, Infusion, Depends on participant weight, Every 2 Months, 12 months.
Placebo, IV Solution, Infusion, Depends on participant weight, Monthly, 6 months.
Placebo=IV Solution, Infusion, Depends on participant weight, Monthly, 6 months. Abatacept=IV Solution, Infusion, Depends on participant weight, Monthly, 6 months
Abatacept, IV solution, Infusion. Depends on participant weight, Monthly, 12+ months
Buenos Aires, Buenos Aires, Argentina
Capital Federal, Buenos Aires, Argentina
Quilmes, Buenos Aires, Argentina
Córdoba, Córdoba Province, Argentina
San Miguel de Tucumán, Tucumán Province, Argentina