1683-9803 1683-9803 S1683-98032023000200067 10.31698/ped.50022023001 Paraguay 00 08 2023 00 08 2023 50 2 67 69 1 2002 76 105-15 2 2001 116 ^s2 ^s2 2 32-3 3 2020 4 2020 [epub ahead of print] [epub ahead of print] 5 2020 PII: S0140-6736 20 20 30627-9 6 2020 395 10228 10228 949