Mercante, J. P. P. .; Peres, M. F. P. .; Bernik, M. A. .; Corchs, F. .; Guendler, V. Z. .; Zukerman, E. . Disease Progression to Chronic Migraine: Onset of Symptoms of Headaches, Anxiety and Mood Disorders. Headache Med 2011, 2, 5-9.