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Subclinical hip involvement in rheumatoid arthritis. An ultrasound assessment Vladimir Aroja Santos; Jessica Gutiérrez; Hugo Sandoval; Araceli Bernal-González; Melisa Valdivieso-Ruiz; Sandra Rodríguez-Flores; Mariana Moreno Ramírez; Aarón Daniel Antonio Arrieta Aguilar; Marwin Gutiérrez; Carlos Pineda;

The coexistence of rheumatoid arthritis and ankylosing spondylitis: Case series and literature review Hanene Lassoued Ferjani; Ben Ayed Hiba; Dorra Ben Nessib; Dhia Kaffel; Kaouther Maatallah; Wafa Hamdi;