Reduction in missed school days and improvement in parent activity participation in children with juvenile idiopathic arthritis treated with abatacept - Ruperto N; Lovell DJ; Li T; Paz E; Horneff G; Huppertz HI; Deslandre CJ; Minden K; Punaro M; Nunez AF; Sigal L; Block A; et al. (BMC, 2008)