2238-0094 2238-0094 S2238-00942015000100051 10.4025/rbhe.v15i1.575 Brazil 00 04 2015 00 04 2015 15 1 51 81

19 45 45 65-81 2 97-162 76 31-40 12 22-23 22-23 7-29 11 11 11 241-53 21 21 51-78 31 57-68 15 59-84 5 13-24 35 3 3 17-35 1 2 2 85-103