1516-7313 1516-7313 S1516-73132016000400014 10.1590/1516-731320160040014 Brazil 00 10 2016 00 10 2016 22 4 1063 1084

28 6 6 591-613 29. ed. 14 1 1 39-44 17-52 18 3 3 681-96 331-39 14 1 1 25-33 220 220 44-9