1683-9803 1683-9803 S1683-98032020000200100 10.31698/ped.47022020011 Paraguay Paraguay 00 08 2020 00 08 2020 47 2 100 102

1 2020 210 2 2 2 2020 250 2 2 3 2020 104 3 3 4 2020 183 1 1 71-7 5 2020 1 4 4 6 2020 92 6 6 374-5