Improved physical functioning and work productivity in ankylosing spondylitis (AS) patients who were treated with adalimumab-ATLAS trial results by Vanderheijde, D, Wordsworth, P, Luo, M, Mease, P, Reveille, J, Zeidler, H, Breban, M, Westhovens, R, Chmiel, J, Chen, N, Wong, R, Davis, J