1517-9702 1517-9702 S1517-97022015000401009 10.1590/S1517-9702201512139014 España 00 12 2015 00 12 2015 41 4 1009 1022

44 44 26-30 53 53 83-97 132 132 608-14 2 2 113-29 21 21 17-26 18 1 1 1138-663 4 1 1 27-40 10 10 127-43 7 106 106 2468-471