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Common Evaluations of Disease Activity in Rheumatoid Arthritis Reach Discordant Classifications across Different PopulationsCanhão, Helena; Rodrigues, Ana Maria; Gregório, Maria João; Dias, Sara S.; Melo Gomes, José António; Santos, Maria José; Faustino, Augusto; Costa, José António; Allaart, Cornelia; Gvozdenović, Emilia; van der Heijde, Desirée; Machado, Pedro; Branco, Jaime C.; Fonseca, João Eurico; Silva, José António · Frontiers in Medicine · 2018