STUDY OF HLA-B27 IN PATIENTS WITH SERONEGATIVE SPONDYLOARTHROPATHY . International Research Journal of Pharmacy, [S. l.], v. 14, n. 6, p. 10–13, 2023. Disponível em: https://irjponline.org/index.php/irjp/article/view/30. Acesso em: 21 oct. 2025.