Low sclerostin levels: a predictive marker of persistent inflammation in ankylosing spondylitis during anti-tumor necrosis factor therapy? - Saad, Carla G. S.; Ribeiro, Ana C. M.; Moraes, Julio C. B.; Takayama, Liliam; Goncalves, Celio R.; Rodrigues, Marcelo B.; Oliveira, Ricardo M. de; Silva, Clovis A.; Bonfa, Eloisa; Pereira, Rosa M. R. (Arthritis research & therapy, 2012)