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Frequency of positive ANCA test in a population with clinical symptoms suggestive of autoimmune disease and the interference of ANA in its interpretation Consuelo Romero-Sánchez, Mario Benavides-Solarte, Isabel Galindo-Ibáñez, Ana Isabel Ospina-Caicedo, Viviana Parra-Izquierdo, Lorena Chila-Moreno, Amanda Villa, María Consuelo Casas-Gómez, Ignacio Angarita, Wilson Bautista-Molano, Verónica Romero-Álvarez, Juan Manuel Bello-Gualtero