2236-3459 2236-3459 S2236-34592017000300021 10.1590/2236-3459/71138 Portugal 00 12 2017 00 12 2017 21 53 21 37

50 50 179-96 2 2 131-54 55 55 219-27 84 84 169-71 153 153 618-25 4