Cardiac autonomic impairment and chronotropic incompetence in fibromyalgia.
da Cunha Ribeiro RP, Roschel H, Artioli GG, Dassouki T, Perandini LA, Calich AL, de Sá Pinto AL, Lima FR, Bonfá E, Gualano B. Arthritis Res Ther. 2011; 13(6):R190. Epub 2011 Nov 18.