2177-6059 2177-6059 S2177-60592015000100079 10.2177‐6059-v40n1201501060004 Brazil 00 06 2015 00 06 2015 40 1 79 100

18 18 8 23 23 15-37 31 113 113 1355-379 25 89 89 1127-144 1 31-45