Mailing Address: Marcos Antonio Almeida Santos • Avenida Gonçalo Prado Rollemberg, 211, sala 210, São José. Postal Code 49010‐410, Aracaju, SE – Brazil. E‐mail: [email protected]; [email protected] Manuscript received October 09, 2014; revised manuscript November 13, 2014; accepted November 13, 2014.
