220 Cost per response for abatacept versus adalimumab in patients with seropositive erosive, early rheumatoid arthritis in the United States, Germany, Spain and Canada. (25th April 2018) - Foo, Jason; Rodríguez-Heredia, José M R; Polanco Sánchez, Carlos; Mtibaa, Mondher; Herrmann, Kirsten H; Alemao, Evo; Postema, Roelien; Baerwald, Christoph