The l-arginine/asymmetric dimethylarginine ratio is improved by anti-Tumor Necrosis Factor–α therapy in inflammatory arthropathies. Associations with aortic stiffness - Angel, Kristin; Provan, Sella Aarrestad; Mowinckel, Petter; Seljeflot, Ingebjørg; Kvien, Tore Kristian; Atar, Dan (Atherosclerosis (00219150), 2012)