2177-6059 2177-6059 S2177-60592015000200333 10.18593/r.v40i2.7225 Brazil 00 12 2015 00 12 2015 40 2 333 355

55 55 721-37 4 2 2 219-30 21 21 23-50 31 110 110 73-92 41 179-94 208 48 48 41 143 143 402-26 3 1-2 1 2 2 16 4 4 9-14