2238-2097 2238-2097 S2238-20972017000300775 10.5965/01045962v26n632017775 Brazil 00 09 2017 00 09 2017 26 63 775 797

6 132-62 4 4 343-65 18 1 1 27-35 60 487 487 1 1 1 29-53 4 2 2 57-80 3 1-2 1-2 145-50 17 3 3 633-52