1028-9933 1028-9933 S1028-99332022000500001 Peru 00 10 2022 00 10 2022 101 5 1 2020 49 4 4 2 2022 16 1 1 3 2017 19 S2 S2 128-34 4 2021 23 3 3 181-3 5 2022 35 5 5 399-400