1981-4690 1981-4690 S1981-46902014000200315 10.1590/1807-55092014000200315 00 06 2014 00 06 2014 28 2 315 327

1 2 3 11 167-72 4 5 6 7 1-17 8 9 12 1-15 10 33 69-86 11 19 143-51 12 13 3 1-16 14 15 16 17 17-40 18 14 60-78 19 14 125-37 20 1 18-43 21 2a 107-88 22 2nd 23 24 6 93-115 25 26 26 443-64 27