1414-4077 1414-4077 S1414-40772017000300793 10.1590/S1414-40772017000300012 Brasil Brazil 00 12 2017 00 12 2017 22 3 793 816

9 1 1 37-49 27 96 96 955-77 40 1 1 61-76 13 3 3 817-25 32 32 5-18 14 53 53 425-36 32 114 114 21-38