2236-3459 2236-3459 S2236-34592013000200143 10.1590/S2236-34592013000200008 Brazil 00 08 2013 00 08 2013 17 40 143 173

11 11 117-30 14 135-45 3 10 10 95-6 3 17 17 54-4 68 68 50-0 5 6 6 137-40 13 29 29 143-69 76 76 72 e 83-72 e 83 83 83 76-9 17 1 1 29-45