2238-2097 2238-2097 S2238-20972016000100097 10.2016/repub-v25n58jan.abr006 Brazil Brazil 00 04 2016 00 04 2016 25 58 97 117

32 32 72-84 21 21 30-56 14 14 89-107 26 67 67 157-78