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  1. CD28/CTLA-4/B7 costimulatory pathway blockade affects regulatory T-cell function in autoimmunity
  2. CTLA-4Ig treatment after immunization exacerbates experimental autoimmune encephalomyelitis
  3. CD28/CTLA-4/B7 and CD40/CD40L costimulation and activation of regulatory T cells
  4. Foxp3+regulatory T cells are activated in spite of B7-CD28 and CD40-CD40L blockade