1516-7313 1516-7313 S1516-73132016000400015 10.1590/1516-731320160040015 Brazil 00 10 2016 00 10 2016 22 4 1085 1095

171-200 1248-251 70 3 3 243-58 33 4 4 21-35 4 1 1 3-17 43-57 16 2 2 149-61 34 4 4 14-22 9 3 3 315-45