1809-3876 1809-3876 S1809-38762017000400887 10.23925/1809-3876.2017v15i4p887-893 Brazil Brazil 00 12 2017 00 12 2017 15 4 0887 0893 35 129 129 1053-066 41 espe espe 1299-311 24 1 1 1-14 12 3 3 929-41