Effect of induction therapy with mycophenolate or cyclophosphamide on serum BAFF levels in patients with systemic lupus erythematosus Alejandra Betancur Herrera; Juan José Mariño Restrepo; Tulio Lopera Restrepo; Laura Robledo Montoya; Juan Felipe Soto Restrepo; Adriana Lucía Vanegas García; Carlos Horacio Muñoz Vahos; Juan Camilo Díaz Coronado; Ricardo Antonio Pineda Tamayo; Gloria Vásquez;