2236-3459 2236-3459 S2236-34592016000300243 10.1590/2236-3459/53889 Brazil Brasil 00 09 2016 00 09 2016 20 50 243 257

2 10 10 3-7 5 44 44 51-62 4 29 29 63-5 5 43 43 35-7