Clinical characterization of patients with HLA-B27-associated uveitis and evaluation of the impact of systemic treatment on the recurrence rate: a cross-sectional study oleh Juan Sebastián Pineda-Sierra, Carlos Cifuentes-González, William Rojas-Carabali, Paula Tatiana Muñoz-Vargas, Alejandro Henao-Posada, Alejandra de-la-Torre