1683-9803 1683-9803 S1683-98032020000200056 10.31698/ped.47022020003 Paraguay 00 08 2020 00 08 2020 47 2 56 60 1 2020 2 2020 395 10239 10239 1771-8 3 2020 10.1111/apa.15376 4 2020 5 2020 6 2020 145 1 1