1982-596x 1982-596x S1982-596x2015000200861 10.14393/REVEDFIL29n58p861 Brazil Brazil Brazil 00 12 2015 00 12 2015 29 58 861 887

16 46 46 33-49 32 114 114 137-49 24 69 69 129-45 32 3 3 619-34