Frequency of ANA/DFS70 in relatives of patients with rheumatoid arthritis compared to patients with rheumatoid arthritis and a healthy population, and its association with health status Verónica Romero-Álvarez; Diana Alejandra Acero-Molina; Adriana Beltrán-Ostos; Juan Manuel Bello-Gualteros; Consuelo Romero-Sánchez;