Pérez Galdós, P. “Study of Quality of Life and Prognostic Factors of Patients With Refractory Epilepsy of Essalud’s Miguel Grau Hospital, Lima – Peru”. ACTA MEDICA PERUANA, Vol. 27, no. 4, Dec. 2010, pp. 244-9, http://54.39.98.165/index.php/AMP/article/view/1413.