2238-0094 2238-0094 S2238-00942017000200121 10.4025/rbhe.v17n2.877 Brazil 00 04 2017 00 04 2017 17 2 121 148

12 16 16 38-63 11 32 32 735-38 33 33 7-48 23 23 1-6 47 47 3-11 7 7 9-33