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AB0865 Frequency of fibromyalgia in patients with spondyloarthritisRodriguez Orozco, V.; Bernard Medina, A.G.; Martinez Bonilla, G.E.; Gutierrez Ureña, S.; Castañeda Ureña, M.; Lopez Rodriguez, A.; Ayala Arzola, M.; Cerpa Cruz, S. · Annals of the Rheumatic Diseases · 2013