1983-2117 1983-2117 S1983-21172008000100069 10.1590/1983-21172008100106 Brazil 00 06 2008 00 06 2008 10 1 69 82

30 141 141 72 5 5 1 1 1 20-30 14 4 4 239-46 1 205-05 7 1 1 37-45 5 2 2 3-16 UFMG UFMG