Differences in referral path, clinical and radiographic outcomes between seronegative and seropositive rheumatoid arthritis Mexican Mestizo patients: A cohort study. - Guaracha-Basáñez, Guillermo Arturo; Contreras-Yáñez, Irazú; Ortiz-Haro, Ana Belén; Pascual-Ramos, Virginia (PLoS ONE, 2024)